Riadzul Jannah, author
2017
UI - Skripsi (Membership)
Livingston, Kathryn
Rockport Publishers, 1999
Buku Teks
Hammer, Nelson R., author
Rockport, 1999
Buku Teks
Wilkening, Fritz
Kanisius, 1992
Buku Teks
Allen, Phyllis Sloan, author
Prentice-Hall, 2000
Buku Referensi