Não informado. (1972). Agricultural engineer. Institution of Agricultural Engineers.
Chicago-Zitierstil (17. Ausg.)Não informado. Agricultural Engineer. Bedford, Inglaterra: Institution of Agricultural Engineers, 1972.
MLA-Zitierstil (8. Ausg.)Não informado. Agricultural Engineer. Institution of Agricultural Engineers, 1972.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.