Ruchs, Barbara
New York : Routledge , 2004
Buku Teks
Galician, Mary-Lou, author
Lawrene Erlabum Associates, Publishers, 2004
Buku Teks
Martinus, 1971
Buku Teks
Theisen, Peter, author
Qanita, 2015
Buku Teks
Davis, H.L., author
William Morrow, 1952
Buku Teks