Não informado. (1937). Agricultural Education. American Vocational Association, Agricultural Section.
Style de citation Chicago (17e éd.)Não informado. Agricultural Education. Des Moines, Iowa: American Vocational Association, Agricultural Section, 1937.
Style de citation MLA (8e éd.)Não informado. Agricultural Education. American Vocational Association, Agricultural Section, 1937.
Attention : ces citations peuvent ne pas être correctes à 100%.