APA
(1957). Vitamin B12 and antibiotics in animal nutrition. Merck & Co. Inc., New Jersey: .
Chicago
1957. Vitamin B12 and antibiotics in animal nutrition. Merck & Co. Inc., New Jersey: .
Harvard
(1957). Vitamin B12 and antibiotics in animal nutrition. Merck & Co. Inc., New Jersey: .
MLA
Vitamin B12 and antibiotics in animal nutrition. Merck & Co. Inc., New Jersey: . 1957.