Gaya APA

Machlis, G, E., Ticnell, D, L. (1985). Stats of the World's Parks ( An International Assessment for Resource Management, Policy, and Ressearch ) . Boulder, London: Westview Press.

Gaya MLA

Machlis, Gary, E.., Ticnell, David, L.. "Stats of the World's Parks ( An International Assessment for Resource Management, Policy, and Ressearch )". Boulder, London: Westview Press, 1985. Text.