APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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