Chambers, Robert, 1932-, author
Longman, 1983
Buku Teks
Renaud, Bertrand
Oxford University Press, 1981
Buku Teks
Clinard, Marshall B. (Marshall Barron), author
John Wiley & Sons, 1973
Buku Teks
Carman, John S.
Pergamon Press, 1979
Buku Teks
Coombs, Philip H., author
Johns Hopkins University Press, 1974
Buku Teks