Grant, Wyn
Harvester Wheatsheaf , 1993
Buku Teks
Sharkansky, Ira
McGraw-Hill, 1975
Buku Teks
Sullivan, Michael
Harvester Wheatsheaf, 1992
Buku Teks
by James E. Anderson; David Brady; Charles Bullock III; Joseph stewart, JR
Brooks/Cole; cengage learning, 1984
Buku Teks
Matthews, Roger
Routledge , 2008
Buku Teks