APA aipamena

Higgins, W., & Alrich, P. (2011). Orchid genera lectotypess.

Chicago Style aipamena

Higgins, Wesley, y Peggy Alrich. Orchid Genera Lectotypess. 2011.

MLA aipamena

Higgins, Wesley, y Peggy Alrich. Orchid Genera Lectotypess. 2011.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.