APA Edition Citation

Blacklock, Crewe, W., Davey, T. H., & Southwell. (1973). Guide to human parasitology (9th ed.). ELBS.

Chicago Edition Citation

Blacklock, W. Crewe, T. H. Davey, and Southwell. Guide to Human Parasitology. 9th ed. ELBS, 1973.

MLA Edition Citation

Blacklock, et al. Guide to Human Parasitology. 9th ed. ELBS, 1973.