Ayala, P. D., Beller, W., & Hein, P. (1990). Sustainable development and environmental management of small islands. Unesco and Parthenon Publishing Group.
Cita Chicago (17th ed.)Ayala, P. D., W. Beller, i P. Hein. Sustainable Development and Environmental Management of Small Islands. Paris: Unesco and Parthenon Publishing Group, 1990.
Cita MLA (9th ed.)Ayala, P. D., et al. Sustainable Development and Environmental Management of Small Islands. Unesco and Parthenon Publishing Group, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.