Dyfyniad APA

W Beller, D'Ayola, P., & Hein, P. (1990). Sustainable developmentand environmental management of small islands. Unesco and Parthon on Publishing Group.

Dyfyniad Arddull Chicago

W Beller, P. D'Ayola, and P. Hein. Sustainable Developmentand Environmental Management of Small Islands. Paris: Unesco and Parthon on Publishing Group, 1990.

Dyfyniad MLA

W Beller, et al. Sustainable Developmentand Environmental Management of Small Islands. Unesco and Parthon on Publishing Group, 1990.

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