Umi Habibatul Muyasaroh, author
2015
UI - Skripsi (Membership)
Rivers, William L., author
Wadsworth, 1983
Buku Teks
Maulida Andrianti, author
UI - Skripsi (Membership)
Morrish, John, author
Routledge, 1996
Buku Teks
Gilmore, Gene, author
Body & Fraser Publishing Company, 1997
Buku Teks