APA (7th ed.) Citation

Blacklock, D. B., & Southwell, T. (1940). A guide to human parasitology for medical practitioners (4th ed.). Williams & Wilkins.

Chicago Style (17th ed.) Citation

Blacklock, D. B., and T. Southwell. A Guide to Human Parasitology for Medical Practitioners. 4th ed. Baltimore: Williams & Wilkins, 1940.

MLA (9th ed.) Citation

Blacklock, D. B., and T. Southwell. A Guide to Human Parasitology for Medical Practitioners. 4th ed. Williams & Wilkins, 1940.