Não informado. (1937). Agricultural Education. American Vocational Association, Agricultural Section.
Chicagoスタイル(17版)引用形式Não informado. Agricultural Education. Des Moines, Iowa: American Vocational Association, Agricultural Section, 1937.
MLA(8版)引用形式Não informado. Agricultural Education. American Vocational Association, Agricultural Section, 1937.
警告: この引用は必ずしも正確ではありません.