Citação norma APA

Iowa State College. Agricultural Extension Dept & Iowa State College. Agricultural Extension Dept. Schools Section. (1912). School circular. Dept. of Agricultural Extension, Schools Section.

Citação norma Chicago

Iowa State College. Agricultural Extension Dept and Iowa State College. Agricultural Extension Dept. Schools Section. School Circular. Ames, Iowa: Dept. of Agricultural Extension, Schools Section, 1912.

Citação norma MLA

Iowa State College. Agricultural Extension Dept and Iowa State College. Agricultural Extension Dept. Schools Section. School Circular. Dept. of Agricultural Extension, Schools Section, 1912.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.