Pollard, E. Y. (1993). Monitoring butterflies for ecology and conservation: The british butterfly monitoring scheme. Chapman and Hall.
Chicago Edition CitationPollard, E Yates. Monitoring Butterflies for Ecology and Conservation: The British Butterfly Monitoring Scheme. London: Chapman and Hall, 1993.
MLA Edition CitationPollard, E Yates. Monitoring Butterflies for Ecology and Conservation: The British Butterfly Monitoring Scheme. Chapman and Hall, 1993.
Warning: These citations may not always be 100% accurate.