APA (7th ed.) Citation

Elston, R. C., & Johnson, W. D. (1987). Essentials of biostatistics. Davis.

Chicago Style (17th ed.) Citation

Elston, Robert C., and William D. Johnson. Essentials of Biostatistics. Philadelphia: Davis, 1987.

MLA (9th ed.) Citation

Elston, Robert C., and William D. Johnson. Essentials of Biostatistics. Davis, 1987.