Sigit, S. (1979). Analisa Break-Even. s.n.
Chicago Style (17th ed.) CitationSigit, Soehardi. Analisa Break-Even. s.n, 1979.
MLA (8th ed.) CitationSigit, Soehardi. Analisa Break-Even. s.n, 1979.
Warning: These citations may not always be 100% accurate.