Ogburn, William F., author
Houghton Mifflin, 1964
Buku Teks
Schaefer, Richard T, author
McGraw-Hill, 2012
Buku Teks
Calhoun, Craig J., author
McGraw-Hill , 1994
Buku Teks
Nobbs, Jack
Macmillan Education, Ltd., 1989
Buku Teks
Finsterbusch, Kurt, author
McGraw-Hill, 2006
Buku Teks