Não informado. (1954). Agricultural Engineers Yearbook. American Society of Agricultural Engineers.
Chicago-Zitierstil (17. Ausg.)Não informado. Agricultural Engineers Yearbook. St. Joseph, Mich: American Society of Agricultural Engineers, 1954.
MLA-Zitierstil (8. Ausg.)Não informado. Agricultural Engineers Yearbook. American Society of Agricultural Engineers, 1954.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.