Whittlesey, Charles R.
Macmillan, 1967
Buku Teks SO
edited by Deane Carson
Wiley, 1972
Buku Teks SO
edited by Deane Carson
Wiley, 1966
Buku Teks SO
Kamerschen, David R.
South-Western Publishing, 1992
Buku Teks SO
Chandler, Lester Vernon, 1905-
Harper & Row , 1959-1973
Buku Teks SO