Gaya APA
Barbour, M, G, , D. (1987).
Terrestrial plant ecology, 2nd ed. .
Menlo Park:
Menlo Park Benjamin/Cummings Publishing Comapany.
Gaya MLA
Barbour, Michael, G., , Dkk..
"Terrestrial plant ecology, 2nd ed. ".
Menlo Park:
Menlo Park Benjamin/Cummings Publishing Comapany,
1987.
Buku.