Etherington, B. (2007). Cold Calling for Chickens. Marshall Cavendish Limited.
Cita Chicago Style (17a ed.)Etherington, Bob. Cold Calling for Chickens. Marshall Cavendish Limited, 2007.
Cita MLA (8a ed.)Etherington, Bob. Cold Calling for Chickens. Marshall Cavendish Limited, 2007.
Precaución: Estas citas no son 100% exactas.