Muhammad Khalis Gagah Pratama, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2023
UI - Skripsi Membership
London: Tiger Books International, 1994,
Buku Referensi
Lerner, Joel J., author
McGraw-Hill, 1985
Buku Teks
Hallman, G. Victor, author
McGraw-Hill , 1983
Buku Teks
Robert C. Arffa
John Wiley & Sons, 2001
Buku Teks