Não informado. (1913). Extension Bulletin. Washington State University, Cooperative Extension Service.
Chicagoスタイル(17版)引用形式Não informado. Extension Bulletin. Pullman, Wash: Washington State University, Cooperative Extension Service, 1913.
MLA(8版)引用形式Não informado. Extension Bulletin. Washington State University, Cooperative Extension Service, 1913.
警告: この引用は必ずしも正確ではありません.