E vD Parnell. (1957). Profitable poultry production. John wiley & sons Inc.
Čikaški stil citiranjaE vD Parnell. Profitable Poultry Production. John wiley & sons Inc, 1957.
MLA način citiranjaE vD Parnell. Profitable Poultry Production. John wiley & sons Inc, 1957.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.