Não informado. (1913). Extension Bulletin. Washington State University, Cooperative Extension Service.
Style de citation Chicago (17e éd.)Não informado. Extension Bulletin. Pullman, Wash: Washington State University, Cooperative Extension Service, 1913.
Style de citation MLA (8e éd.)Não informado. Extension Bulletin. Washington State University, Cooperative Extension Service, 1913.
Attention : ces citations peuvent ne pas être correctes à 100%.