Yoder, Dale, author
Prentice-Hall, 1962
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1984
Buku Teks
edited by Max S. Wortman
Allyn and Bacon , 1970
Buku Teks
Mills, Daniel Quinn, author
McGraw-Hill, 1994
Buku Teks
Bendix, Reinhard, author
John Wiley & Sons, 1956
Buku Teks