APA Edition Citation

Haswell, W. A., Marshall, A. J., & Parker, T. J. (1972). Text book of Zoology: Invertebrates.

Chicago Edition Citation

Haswell, William A., A J. Marshall, and T Jeffery Parker. Text Book of Zoology: Invertebrates. London, E L B S, 1972.

MLA Edition Citation

Haswell, William A., et al. Text Book of Zoology: Invertebrates. 1972.