Cita APA

Sauer, J. R. 1., & Droege, S. (1990). Survey designs and statistical methods for the estimation of avian population trends. Washington, DC: U.S. Dept. of the Interior, Fish and Wildlife Service.

Citación estilo Chicago

Sauer, John R. 1936-, y Sam Droege. Survey Designs and Statistical Methods for the Estimation of Avian Population Trends. Washington, DC: U.S. Dept. of the Interior, Fish and Wildlife Service, 1990.

Cita MLA

Sauer, John R. 1936-, y Sam Droege. Survey Designs and Statistical Methods for the Estimation of Avian Population Trends. Washington, DC: U.S. Dept. of the Interior, Fish and Wildlife Service, 1990.