APA-referens (7:e uppl.)

Brooker, R. J. (2008). Biology. McGraw-Hill Higher Education.

Chicago-referens (17:e uppl.)

Brooker, Robert J. Biology. Boston: McGraw-Hill Higher Education, 2008.

MLA-referens (8:e uppl.)

Brooker, Robert J. Biology. McGraw-Hill Higher Education, 2008.