Gaya APA
Cowan, M, K.
(2012).
Microbiology: A Systems Approach
(
Fourth Edition)
.
U.S.A:
The MC Graw Hill Companies.
Gaya MLA
Cowan, Marjorie, Kelly.
"Microbiology: A Systems Approach".
Fourth Edition
U.S.A:
The MC Graw Hill Companies,
2012.
Text.