Bishop, H.M.
Appleton-Century-Crofts, 1956
Buku Teks
edited by Dwight Waldo
McGraw-Hill, 1953
Buku Teks
Coffey, Alan R.
Prentice-Hall, 1971
Buku Teks
edited by Lewis A. Coser, Bernard Rosenberg
Macmillan, 1964
Buku Teks
edited by Lewis A. Coser and Bernard Rosenberg
Macmillan, 1957
Buku Teks