APA (7th ed.) Citation

Simpkins, J., & Williams, J. I. (1989). Advanced biology (3rd ed.). Collins Educational.

Chicago Style (17th ed.) Citation

Simpkins, J., and J. I. Williams. Advanced Biology. 3rd ed. London: Collins Educational, 1989.

MLA (9th ed.) Citation

Simpkins, J., and J. I. Williams. Advanced Biology. 3rd ed. Collins Educational, 1989.