Appleyard, R. Ducks: Breeding, rearing and management (4.). Poultry world Limited.
Citación estilo ChicagoAppleyard, Reginald. Ducks: Breeding, Rearing and Management. 4. London: Poultry world Limited.
Cita MLAAppleyard, Reginald. Ducks: Breeding, Rearing and Management. 4. Poultry world Limited.
Warning: These citations may not always be 100% accurate.