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Buku Teks SO
Randy Raharja
Fakultas Eknonomi dan Bisnis Universitas Indonesia, 2018
UI - Tugas Akhir
Meyer, Charles H.
West Publishing Co., 1995
Buku Teks
Ross, Stephen A.
McGraw-Hill , 1999
Buku Teks
Weston, John Fred, 1916-
Dryden Press, 1992
Buku Teks