Cita APA (7a ed.)

Pollard, E., & Yates, T. (1993). Monitoring butterflies for ecology conservation: The British butterfly monitoring scheme. Chapman and Hall.

Cita Chicago Style (17a ed.)

Pollard, E., y T.J Yates. Monitoring Butterflies for Ecology Conservation: The British Butterfly Monitoring Scheme. London: Chapman and Hall, 1993.

Cita MLA (9a ed.)

Pollard, E., y T.J Yates. Monitoring Butterflies for Ecology Conservation: The British Butterfly Monitoring Scheme. Chapman and Hall, 1993.