Iowa State College. Agricultural Extension Dept & Iowa State College. Agricultural Extension Dept. Schools Section. (1912). School circular. Dept. of Agricultural Extension, Schools Section.
Chicago-Zitierstil (17. Ausg.)Iowa State College. Agricultural Extension Dept und Iowa State College. Agricultural Extension Dept. Schools Section. School Circular. Ames, Iowa: Dept. of Agricultural Extension, Schools Section, 1912.
MLA-Zitierstil (8. Ausg.)Iowa State College. Agricultural Extension Dept und Iowa State College. Agricultural Extension Dept. Schools Section. School Circular. Dept. of Agricultural Extension, Schools Section, 1912.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.