APA (7th ed.) Citation

Brown, R. W., Ferguson, J., Lawrence, M., & Lees, D. (1987). Tracks & signs of the birds of Britain & Europe (2nd ed.). C. Helm.

Chicago Style (17th ed.) Citation

Brown, R. W., John Ferguson, Michael Lawrence, and David Lees. Tracks & Signs of the Birds of Britain & Europe. 2nd ed. London: C. Helm, 1987.

MLA (8th ed.) Citation

Brown, R. W., et al. Tracks & Signs of the Birds of Britain & Europe. 2nd ed. C. Helm, 1987.