et al
Học thuậtThân thiện
Definition
- Adverb:
- And elsewhere: Used in academic or formal writing to indicate that other, similar instances or locations exist in the text or source being referenced.
- And others: An abbreviation of the Latin phrases 'et alii' (masculine plural), 'et aliae' (feminine plural), or 'et alia' (neuter plural). It is used primarily in citations to refer to a work by multiple authors, indicating the primary author followed by others.
Usage
- In Citations: Used after the first author's name to signify that there are additional co-authors. It is standard practice in many academic styles (e.g., APA, MLA, Chicago) for sources with three or more authors.
- In Textual References: Used to avoid repeating a long list of names or places, directing the reader to other relevant parts of the source material.
Examples
- Meaning "and others" (in citations):
- The theory was first proposed by Johnson et al. in their seminal 1995 paper.
- As demonstrated in the study (Miller et al., 2010), the results were conclusive.
- Meaning "and elsewhere" (in textual references):
- This theme is explored in Chapter 3 et al. of the same volume.
- The phenomenon is discussed by the author on page 42 et al.
Advanced Usage
- Punctuation: Always followed by a period (.) because it is an abbreviation. It is typically written in italics () in formal academic writing, though this practice is becoming less strict.
- In Bibliographies/Reference Lists: Styles vary. Some require listing all authors, while others use et al. after the first author for works with many contributors.
- Grammar: When used to mean "and others," it functions as part of the subject. The verb should agree with the plural sense of "others."
- Correct: Smith et al. have argued this point. (The verb "have" agrees with the plural "others" implied by et al.)
- Incorrect: Smith et al. has argued...
Variants and Related Words
- Etc. (et cetera): Means "and other similar things" or "and so forth." Used for lists of , not people.
- We need to buy pens, paper, notebooks, etc.
- Ibid.: An abbreviation of the Latin , meaning "in the same place." Used in citations to refer to the immediately preceding source.
- Cf.: An abbreviation of the Latin , meaning "compare." Used to direct the reader to another source for comparison.
Synonyms
- And co-authors: Specifically for the citation usage.
- And colleagues: A less formal alternative, but not a direct substitute in citations.
- And associates
Related Phrases
- Et al.'s: The possessive form, used to indicate something belongs to the group of authors.
- This conclusion is supported by Martinez et al.'s findings.
- As cited in... et al.: A phrase used when referencing a source found within another author's work.
Adverb
- and elsewhere (used when referring to other occurrences in a text)
- and others ('et al.' is used as an abbreviation of `et alii' (masculine plural) or `et aliae' (feminine plural) or `et alia' (neuter plural) when referring to a number of people)
- the data reported by Smith et al.