Pollard, E., & Yates, T. J. (1993). Monitoring butterflies for ecology and conservation: The British Butteerfly Monitoring Scheme. New York: Chapman & Hall.
Chicago Style CitationPollard, Ernest, and Tina J. Yates. Monitoring Butterflies for Ecology and Conservation: The British Butteerfly Monitoring Scheme. New York: Chapman & Hall, 1993.
MLA CitationPollard, Ernest, and Tina J. Yates. Monitoring Butterflies for Ecology and Conservation: The British Butteerfly Monitoring Scheme. New York: Chapman & Hall, 1993.
Warning: These citations may not always be 100% accurate.