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.
Precaución: Estas citas no son 100% exactas.