Não informado. (1937). Agricultural Education. American Vocational Association, Agricultural Section.
Čikaški stil citiranja (17. izdanje)Não informado. Agricultural Education. Des Moines, Iowa: American Vocational Association, Agricultural Section, 1937.
MLA način citiranja (8. izdanje)Não informado. Agricultural Education. American Vocational Association, Agricultural Section, 1937.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.