Iowa State College. Agricultural Extension Dept. (1910). Extension bulletin. The Dept..
Čikaški stil citiranja (17. izdanje)Iowa State College. Agricultural Extension Dept. Extension Bulletin. Ames, Iowa: The Dept., 1910.
MLA način citiranja (8. izdanje)Iowa State College. Agricultural Extension Dept. Extension Bulletin. The Dept., 1910.
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