Rogers, Daniel C.
The Free Press , 1971
Buku Teks
Jakubuskas, Edward B., author
Addison-Wesley, 1973
Buku Teks
Ruchlin, Hirsch S
Charles C Thomas , 1973
Buku Teks
Mc Graw-Hill, 1974
Buku Teks
Brownlee, O.H. (Oswald Harvey), 1917-, author
Prentice-Hall, 1954
Buku Teks