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Buku Teks
Anne T. Coughlan, Eric Anderson, Louis W. Stern, Adel El-Ansary
Prentice-Hall, 2001
Buku Teks
Rosenbloom, Bert, author
South Western Cengage Learning, 2012
Buku Teks
Pelton, Lou E., author
McGraw-Hill Irwin, 2002
Buku Teks
Sherly Octaviana Sari, author
2016
UI - Tugas Akhir