Gaya APA
ENGER, E, D., ROSS, F, C.
(2000).
Concepts in biology
(
9th ed.)
.
Boston:
McGraw-Hill.
Gaya MLA
ENGER, Eldon, D.., ROSS, Frederick, C..
"Concepts in biology".
9th ed.
Boston:
McGraw-Hill,
2000.
Buku.