Não informado. (1956). Practical Power Farming. British Power Farming Club.
Chicagoスタイル(17版)引用形式Não informado. Practical Power Farming. London: British Power Farming Club, 1956.
MLA(8版)引用形式Não informado. Practical Power Farming. British Power Farming Club, 1956.
警告: この引用は必ずしも正確ではありません.