Não informado. (1950). Rural advisory leaflet. Edinburgh and East of Scotland College of Agriculture.
Chicago (17e ed.) BronvermeldingNão informado. Rural Advisory Leaflet. Edinburgh, Inglaterra: Edinburgh and East of Scotland College of Agriculture, 1950.
MLA (8e ed.) BronvermeldingNão informado. Rural Advisory Leaflet. Edinburgh and East of Scotland College of Agriculture, 1950.
Let op: Deze citaties zijn niet altijd 100% accuraat.