Ghiselli, Edwin E.
McGraw-Hill, 1955
Buku Teks
Yoder, Dale
Prentice-Hall, 1962
Buku Teks
edited by Edwin A. Fleishman
Dorsey Press, 1967
Buku Teks
Yoder, Dale
Prentice-Hall, 1984
Buku Teks
by Malcolm E. Shaw ... [and others]
University Associates, 1980
Buku Teks SO