edited by Stuart Oskamp
Sage, 1987
Buku Teks
Collins, Barry E.
John Wiley & Sons, 1964
Buku Teks
Gardner, Burleigh B.
Irwin , 1955
Buku Teks
edited by Garth J.O. Fletcher and Margaret S. Clark
Blackwell, 2003
Buku Teks
Made Pidarta
Bina Aksara, 1988
Buku Teks