Cita APA (7a ed.)

Cieśląk, M., & Dul, B. (2006). Feathers: Identification for bird conservation. Natura Publishing House.

Cita Chicago Style (17a ed.)

Cieśląk, Marian, y Bołeslaw Dul. Feathers: Identification for Bird Conservation. Warsaw: Natura Publishing House, 2006.

Cita MLA (9a ed.)

Cieśląk, Marian, y Bołeslaw Dul. Feathers: Identification for Bird Conservation. Natura Publishing House, 2006.