APA aipamena

Stevens, G. C., & Matthew, K. K. (1989). Quercus costaricensis Liebm. and the problem of multi-seeded acorns.

Chicago Style aipamena

Stevens, George C., y Kathryn K. Matthew. Quercus Costaricensis Liebm. and the Problem of Multi-seeded Acorns. 1989.

MLA aipamena

Stevens, George C., y Kathryn K. Matthew. Quercus Costaricensis Liebm. and the Problem of Multi-seeded Acorns. 1989.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.