APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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