Cita APA

Machlis, G. E. 1., Tichnell, D. L., & Eidsvik, H. K. (1985). The state of the world's parks: An international assessment for resource management, policy, and research. Boulder: Westview Press.

Citación estilo Chicago

Machlis, Gary E. 1951-, David L. Tichnell, y Hal K. Eidsvik. The State of the World's Parks: An International Assessment for Resource Management, Policy, and Research. Boulder: Westview Press, 1985.

Cita MLA

Machlis, Gary E. 1951-, David L. Tichnell, y Hal K. Eidsvik. The State of the World's Parks: An International Assessment for Resource Management, Policy, and Research. Boulder: Westview Press, 1985.