Kerman, Joseph
Worth Publishers, 1996
Buku Teks
Kamien, Roger, author
McGraw-Hill, 1998
Buku Referensi
Baldwin, Lillian, author
Silver Burdett, 1948
Buku Teks
Amanda Amilia Atmaheni, author
2017
UI - Skripsi (Membership)
Ewen, David, author
Prentice-Hall, 1989
Buku Referensi