Não informado. (1968). Farm buildings digest. Farm Buildings Information Centre.
Chicago-Zitierstil (17. Ausg.)Não informado. Farm Buildings Digest. Kenilworth, Inglaterra: Farm Buildings Information Centre, 1968.
MLA-Zitierstil (8. Ausg.)Não informado. Farm Buildings Digest. Farm Buildings Information Centre, 1968.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.