Cita APA (7a ed.)

Simpkins, J., & Williams, J. I. (1989). Advanced biology (3rd ed.). Unwin Hyman.

Cita Chicago Style (17a ed.)

Simpkins, J., y J. I. Williams. Advanced Biology. 3rd ed. London: Unwin Hyman, 1989.

Cita MLA (8a ed.)

Simpkins, J., y J. I. Williams. Advanced Biology. 3rd ed. Unwin Hyman, 1989.