APA (7th ed.) Citation

Simpkins, J., & Williams, J. I. (1984). Advanced biology. Unwin Hayman.

Chicago Style (17th ed.) Citation

Simpkins, J., and J. I. Williams. Advanced Biology. London: Unwin Hayman, 1984.

MLA (9th ed.) Citation

Simpkins, J., and J. I. Williams. Advanced Biology. Unwin Hayman, 1984.