Não informado. (1937). Agricultural Education. American Vocational Association, Agricultural Section.
Chicago (17e ed.) BronvermeldingNão informado. Agricultural Education. Des Moines, Iowa: American Vocational Association, Agricultural Section, 1937.
MLA (8e ed.) BronvermeldingNão informado. Agricultural Education. American Vocational Association, Agricultural Section, 1937.
Let op: Deze citaties zijn niet altijd 100% accuraat.