Cita APA (7th ed.)
ebrary, Inc, Gutierrez, B., & Pena, C. (2010). Tundras: Vegetation, wildlife and climate trends. Nova Science Publishers.
Cita Chicago (17th ed.)
ebrary, Inc, Beltran Gutierrez, i Cristos Pena. Tundras: Vegetation, Wildlife and Climate Trends. New York: Nova Science Publishers, 2010.
Cita MLA (9th ed.)
ebrary, Inc, et al. Tundras: Vegetation, Wildlife and Climate Trends. Nova Science Publishers, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.