United States Armed Forces Institute. Descriptive geometry: A college correspondence course. United States Armed Forces Institute.
Čikaški stil citiranja (17. izdanje)United States Armed Forces Institute. Descriptive Geometry: A College Correspondence Course. Wisconsin: United States Armed Forces Institute.
MLA način citiranja (9. izdanje)United States Armed Forces Institute. Descriptive Geometry: A College Correspondence Course. United States Armed Forces Institute.
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