APA (7th ed.) Zitazioa
ebrary, Inc, Nowak, K. I., & Strybel, H. F. (2012). Spruce: Ecology, management, and conservation. Nova Science Publishers.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, Kajetan I. Nowak, eta Helena F. Strybel. Spruce: Ecology, Management, and Conservation. New York: Nova Science Publishers, 2012.
MLA (9th ed.) Zitazioa
ebrary, Inc, et al. Spruce: Ecology, Management, and Conservation. Nova Science Publishers, 2012.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.