APA (7th ed.) Citation

Gilles, H. M., & Ball, P. A. J. (1991). Hookworm infections. Elsevier.

Chicago Style (17th ed.) Citation

Gilles, H. M., and P. A. J. Ball. Hookworm Infections. Amsterdam ; New York: Elsevier, 1991.

MLA (9th ed.) Citation

Gilles, H. M., and P. A. J. Ball. Hookworm Infections. Elsevier, 1991.