APA (7th ed.) Citation

Hess, W. R., Howell, P. G., & Verwoerd, D. W. (1971). African swine fever virus. Springer-Verlag.

Chicago Style (17th ed.) Citation

Hess, William Robert, P. G. Howell, and D. W. Verwoerd. African Swine Fever Virus. New York: Springer-Verlag, 1971.

MLA (9th ed.) Citation

Hess, William Robert, et al. African Swine Fever Virus. Springer-Verlag, 1971.