APA
Pfennig N., Bryant M., Staley J. & Holt J. (1989). Bergey's : manual of systematic bacteriology. Baltimore: Williams & Wilkins.
Chicago
Pfennig N, Bryant M, Staley James and Holt John. 1989. Bergey's : manual of systematic bacteriology. Baltimore: Williams & Wilkins.
Harvard
Pfennig N., Bryant M., Staley J. and Holt J. (1989). Bergey's : manual of systematic bacteriology. Baltimore: Williams & Wilkins.
MLA
Pfennig N, Bryant M, Staley James and Holt John. Bergey's : manual of systematic bacteriology. Baltimore: Williams & Wilkins. 1989.