Não informado. (2001). Bulletin. Iowa Agricultural and Home Economics Experiment Station.
Style de citation Chicago (17e éd.)Não informado. Bulletin. Ames, Iowa: Iowa Agricultural and Home Economics Experiment Station, 2001.
Style de citation MLA (8e éd.)Não informado. Bulletin. Iowa Agricultural and Home Economics Experiment Station, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.