SIMORANGKIR, O. (1983). Etiket Kantor. Yagrat.
Chicago Style (17th ed.) CitationSIMORANGKIR, O.P. Etiket Kantor. Yagrat, 1983.
MLA (8th ed.) CitationSIMORANGKIR, O.P. Etiket Kantor. Yagrat, 1983.
Warning: These citations may not always be 100% accurate.