APA aipamena

Bechtel,Helmut. (1981). The manual of cultivated orchid species. Bath press.

Chicago Style aipamena

Bechtel,Helmut. The Manual of Cultivated Orchid Species. Great britain: Bath press, 1981.

MLA aipamena

Bechtel,Helmut. The Manual of Cultivated Orchid Species. Bath press, 1981.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.