Glahe, Fred R.
San Diego Harcourt Brace Jovanovich, Inc.,
Buku Teks
Glueck, William F.
McGraw-Hill, 1984
Buku Teks
Glueck, William F.
McGraw-Hill, 1980
Buku Teks
by Joseph C. Latona ... [and others]
South-Western Publishing, 1984
Buku Teks
Clark, Mary Jo
Appleton & Lange, 1999
Buku Teks