Cita APA (7th ed.)

Villee, C. A. (1992). Biologia (2 ed.). Interamericana - McGraw-Hill.

Cita Chicago (17th ed.)

Villee, Claude A. Biologia. 2 ed. Mexico D F: Interamericana - McGraw-Hill, 1992.

Cita MLA (9th ed.)

Villee, Claude A. Biologia. 2 ed. Interamericana - McGraw-Hill, 1992.