Não informado. (1967). Farm Building News. American Farm Building Services.
Chicago-referens (17:e uppl.)Não informado. Farm Building News. Iola, Wis: American Farm Building Services, 1967.
MLA-referens (8:e uppl.)Não informado. Farm Building News. American Farm Building Services, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.