Lynch, James J.
Pan Books, 1972
Buku Teks
edited by John Edwards ... [et al.]
John Wiley and Sons, 1983
Buku Teks SO
Walker, James W.
McGraw-Hill , 1980
Buku Teks
Gilg, Andrew
Routledge, 1996
Buku Teks SO
Faludi, Andreas
Pergamon Press, 1978
Buku Teks