Cita APA (7th ed.)

ebrary, Inc, Nowak, K. I., & Strybel, H. F. (2012). Spruce: Ecology, management, and conservation. Nova Science Publishers.

Cita Chicago (17th ed.)

ebrary, Inc, Kajetan I. Nowak, i Helena F. Strybel. Spruce: Ecology, Management, and Conservation. New York: Nova Science Publishers, 2012.

Cita MLA (9th ed.)

ebrary, Inc, et al. Spruce: Ecology, Management, and Conservation. Nova Science Publishers, 2012.