APA aipamena

Perry, W. J. (1987). Technologies to maintain biological diversity. Washington: Congress of the United States.

Chicago Style aipamena

Perry, William J. Technologies to Maintain Biological Diversity. Washington: Congress of the United States, 1987.

MLA aipamena

Perry, William J. Technologies to Maintain Biological Diversity. Washington: Congress of the United States, 1987.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.