APA (7e ed.) Bronvermelding

ebrary, Inc, Ryann, A. L., & Perkins, N. J. (2011). The Black Sea: Dynamics, ecology and conservation. Nova Science Publishers.

Chicago (17e ed.) Bronvermelding

ebrary, Inc, Amy L. Ryann, en Nathan J. Perkins. The Black Sea: Dynamics, Ecology and Conservation. New York: Nova Science Publishers, 2011.

MLA (9e ed.) Bronvermelding

ebrary, Inc, et al. The Black Sea: Dynamics, Ecology and Conservation. Nova Science Publishers, 2011.