APA Style

Williams, S, T., Sharpe, M, E, M. (1989). Bergey's Manual of Systematic Bacteriology. Vol.4 . Baltimore: Williams and Wilkins.

MLA Style

Williams, Stanley, T., Sharpe, M., Elizabeth, M. "Bergey's Manual of Systematic Bacteriology. Vol.4". Baltimore: Williams and Wilkins, 1989. print.