Cita APA (7th ed.)

Villee, C. A. (1978). Biologia (7 ed.). Interamericana - McGraw-Hill.

Cita Chicago (17th ed.)

Villee, Claude A. Biologia. 7 ed. mexico D F: Interamericana - McGraw-Hill, 1978.

Cita MLA (9th ed.)

Villee, Claude A. Biologia. 7 ed. Interamericana - McGraw-Hill, 1978.