Muhammad Ezra Arrazaq Irvan, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2023
UI - Tugas Akhir
Armstrong, Michael, author
Crest Publishing House, 1999
Buku Teks
Tennyson, Ros, author
Indonesia Business Links, 2001
Buku Teks
Artikel Jurnal
Chruden, Herbert J., author
South-Western, 1984
Buku Referensi