Gray, Iain
Cengage Learning, 2011
Buku Teks
Tower, Ralph B.
Prentice-Hall, 1984
Buku Teks
Gray, Iain
Cengage Learning, 2015
Buku Teks
Knechel, W. Robert
South-Western College Publishing, 1998
Buku Teks
Chetryana Gunardi
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1983
UI - Skripsi Membership