Maynard, Mary
Longman, 1993
Buku Teks
edited by Lewis A. Coser and Bernard Rosenberg
Macmillan, 1957
Buku Teks
Handel, Warren H.
Prentice-Hall, 1993
Buku Teks
Macmillan, 1976
Buku Teks
edited by Scott G. McNall
Little, Brown and Company, 1968
Buku Teks