Não informado. (1965). Farm Building Progress. Scottish Farm Buildings Investigation Unit.
Chicago-referens (17:e uppl.)Não informado. Farm Building Progress. Aberdeen, Escocia: Scottish Farm Buildings Investigation Unit, 1965.
MLA-referens (8:e uppl.)Não informado. Farm Building Progress. Scottish Farm Buildings Investigation Unit, 1965.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.