Não informado. (1968). Farm buildings digest. Farm Buildings Information Centre.
Chicagoスタイル(17版)引用形式Não informado. Farm Buildings Digest. Kenilworth, Inglaterra: Farm Buildings Information Centre, 1968.
MLA(8版)引用形式Não informado. Farm Buildings Digest. Farm Buildings Information Centre, 1968.
警告: この引用は必ずしも正確ではありません.