Cita APA (7a ed.)

Weller, M. W. (1967). Distribution and habitat selection of the Black-headed Duck (Heteronetta Atricapilla).

Cita Chicago Style (17a ed.)

Weller, Milton W. Distribution and Habitat Selection of the Black-headed Duck (Heteronetta Atricapilla). 1967.

Cita MLA (8a ed.)

Weller, Milton W. Distribution and Habitat Selection of the Black-headed Duck (Heteronetta Atricapilla). 1967.