APA Style

Holt, J, G., et.al., . (1994). Bergey's manual for determinative bacteriology (9th). Baltimore: Lippincot Williams & Wilkins.

MLA Style

Holt, John, G.., et.al., . "Bergey's manual for determinative bacteriology". 9th Baltimore: Lippincot Williams & Wilkins, 1994. .