Gaya APA
Kelly, M, G., MacGrath, J, C. (1975).
Biology : evolution and adaption to the environment .
Boston:
Houghton Mifflin.
Gaya MLA
Kelly, Mahlon, G.., MacGrath, John, C..
"Biology : evolution and adaption to the environment".
Boston:
Houghton Mifflin,
1975.
Text.