Maier, Norman R.F., author
John Wiley & Sons, 1956
Buku Teks
Dubin, Robert, author
Prentice-Hall, 1974
Buku Teks
Dubin, Robert, author
Prentice-Hall, 1968
Buku Teks
Dubin, Robert, author
Prentice Hall of India, 1977
Buku Teks
Davis, Keith, 1918-, author
McGraw-Hill, 1972
Buku Teks