Gaya APA

Barbour, M, G., D., I, B, J, H, I, P, W. (1987). Terrestrial plant ecology . California:: California: The Benjamin/Cummings; 1987.

Gaya MLA

Barbour, Michael, G.., D., I., Burk,, Jack, H., II., Pitts,, Wanna. "Terrestrial plant ecology". California:: California: The Benjamin/Cummings; 1987, 1987. Text.