Umar,Husein. (2009). Studi Kelayakan Bisnis Edisi 3 Revisi. Gramedia.
Chicago Style (17th ed.) CitationUmar,Husein. Studi Kelayakan Bisnis Edisi 3 Revisi. Gramedia, 2009.
MLA (8th ed.) CitationUmar,Husein. Studi Kelayakan Bisnis Edisi 3 Revisi. Gramedia, 2009.
Warning: These citations may not always be 100% accurate.