Martin, Carole, author
McGraw-Hill, 2012
Buku Teks
Ross, Catherine Sheldrick, author
Neal - Schuman Publishers, Inc., 2002
Buku Teks
Cohen, Akiba A., author
Sage Publications, 1987
Buku Teks
Dale, Ernest, author
McGraw-Hill, 1960
Buku Teks
Cherniss, Cary
Sage Publications, 1980
Buku Teks