APA aipamena

Hauke, R. L. (1967). The Natural History of Equisetum in Costa Rica.

Chicago Style aipamena

Hauke, Richard L. The Natural History of Equisetum in Costa Rica. 1967.

MLA aipamena

Hauke, Richard L. The Natural History of Equisetum in Costa Rica. 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.