Reference: Book with Two or More Authors

Natarajan, R., & Chaturvedi, R. (2003). Geology of the Indian Ocean Floor. Hartford, CT: Merganser University Press.

Ligon, M., Carpenter, K., Brown, W., & Milsop, A. (1983). Computers in the world of business communications. Hartford, CT: Capital Press.

Notice the hanging indent style (about half an inch after the initial line). The abbreviation et al. (for "and others") is not used on the Reference page, regardless of the number of authors, although it can be used in the parenthetical citation of material with three to five authors (after the inital citation, when all are listed) and in all parenthetical citations of material with six or more authors. Notice that all authors are listed last-name-first (unlike MLA style), and that an ampersand — & — is used before the last name.