Interoceanic Workshop on Sustainable Development and Environmental Management of Small Islands, Beller, W. S., D'Ayala, P. G., & Hein, P. (1990). Sustainable development and environmental management of small islands. UNESCO Parthenon Pub. Group.
Lua i Stíl Chicago (17ú heag.)Interoceanic Workshop on Sustainable Development and Environmental Management of Small Islands, William S. Beller, Pier Giovanni D'Ayala, agus Philippe Hein. Sustainable Development and Environmental Management of Small Islands. Paris, Park Ridge, N.J: UNESCO Parthenon Pub. Group, 1990.
Lua MLA (9ú heag.)Interoceanic Workshop on Sustainable Development and Environmental Management of Small Islands, et al. Sustainable Development and Environmental Management of Small Islands. UNESCO Parthenon Pub. Group, 1990.