APA

Willink P. W., Chernoff B. & McCullough J. (2005). A Rapid biological assessment of the aquatic ecosystems of the Pastaza river basin, Ecuador and Perú. Washington, DC: Conservation International.

Chicago

Willink Philip W, Chernoff Barry and McCullough Jennifer. 2005. A Rapid biological assessment of the aquatic ecosystems of the Pastaza river basin, Ecuador and Perú. Washington, DC: Conservation International.

Harvard

Willink P. W., Chernoff B. and McCullough J. (2005). A Rapid biological assessment of the aquatic ecosystems of the Pastaza river basin, Ecuador and Perú. Washington, DC: Conservation International.

MLA

Willink Philip W, Chernoff Barry and McCullough Jennifer. A Rapid biological assessment of the aquatic ecosystems of the Pastaza river basin, Ecuador and Perú. Washington, DC: Conservation International. 2005.