Cita APA

GM Urquhart, J Armour, & J.L Duncan. (1988). Veterinary Parasitology. England.

Chicago Edition Citation

GM Urquhart, J Armour, i J.L Duncan. Veterinary Parasitology. England, 1988.

Cita MLA

GM Urquhart, et al. Veterinary Parasitology. England, 1988.