Cita APA (7th ed.)
Baker, J. J. W., & Allen, G. E. (1972). A course in biology (2d ed.). Addison-Wesley Pub. Co..
Cita Chicago (17th ed.)
Baker, Jeffrey J. W., i Garland E. Allen. A Course in Biology. 2d ed. Reading, Mass.: Addison-Wesley Pub. Co., 1972.
Cita MLA (9th ed.)
Baker, Jeffrey J. W., i Garland E. Allen. A Course in Biology. 2d ed. Addison-Wesley Pub. Co., 1972.
Atenció: Aquestes cites poden no estar 100% correctes.