Cita APA (7th ed.)

Roberts, M. B. V. (1986). Biology: A functional approach (4th ed.). Nelson.

Cita Chicago (17th ed.)

Roberts, M. B. V. Biology: A Functional Approach. 4th ed. London: Nelson, 1986.

Cita MLA (8th ed.)

Roberts, M. B. V. Biology: A Functional Approach. 4th ed. Nelson, 1986.