Cita APA (7a ed.)

Curtis, F. D., & Urban, J. (1949). Biology in daily life. Ginn.

Cita Chicago Style (17a ed.)

Curtis, Francis D., y John Urban. Biology in Daily Life. Boston: Ginn, 1949.

Cita MLA (8a ed.)

Curtis, Francis D., y John Urban. Biology in Daily Life. Ginn, 1949.