APA aipamena

Dixon, K., & Phillips, R. (2015). The orchid conservation challenge.

Chicago Style aipamena

Dixon, Kingsley, y Ryan Phillips. The Orchid Conservation Challenge. 2015.

MLA aipamena

Dixon, Kingsley, y Ryan Phillips. The Orchid Conservation Challenge. 2015.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.