Machlis, G. E., & Tichnell, D. L. (1985). The state of the world's parks: An international assessment for resource management, policy, and research. Westview Press.
芝加哥风格引文Machlis, Gary E., 与 David L. Tichnell. The State of the World's Parks: An International Assessment for Resource Management, Policy, and Research. Boulder, Colo: Westview Press, 1985.
MLA引文Machlis, Gary E., 与 David L. Tichnell. The State of the World's Parks: An International Assessment for Resource Management, Policy, and Research. Westview Press, 1985.
警告：这些引文格式不一定是100％准确.