editors, George S. Bridgges, Joseph G. Weis, Robert D. Crutchfield
Pine Force Press, 1996
Buku Teks
Seidel, Henry M., author
Mosby , 1993
Buku Teks
Fulbrook, Julian
Mansel, 1978
Buku Teks
Dale, Margaret, author
Crest Publishing House, 2001
Buku Teks
Song, Ho Jeong
Seoul : Ung Jin Junior, 2007
Buku Teks