Buku Referensi
Facet Publishing, 2005
Buku Referensi
Simone, Luisa, author
Microsoft Press, 1992
Buku Teks
Edited by Eleanor Harman
University of Toronto, 1961
Buku Teks
Mutia Nurazizah Rachmawati, author
Fakultas Ekonomi dan BIsnis Universitas Indonesia, 2020
UI - Skripsi (Membership)