APA (7th ed.) Citation

Ewer, D. W., Hall, J. B., & Michelmore, J. (1975). Ecological biology: Practical books. Longman.

Chicago Style (17th ed.) Citation

Ewer, D. W., J. B. Hall, and June Michelmore. Ecological Biology: Practical Books. London: Longman, 1975.

MLA (9th ed.) Citation

Ewer, D. W., et al. Ecological Biology: Practical Books. Longman, 1975.