Dewi Wijayanti
2014
UI - Skripsi (Membership)
Keller, Kevin Lane
Prentice Hall Internasional, 1998
Buku Teks
Assael, Henry
Kent Publishing Company, 1984
Buku Teks
Stone, Bob
NTC Business Book, 1988
Buku Teks
Adi Zakaria Afiff, examiner
Universitas Indonesia, 2014
Artikel Jurnal