Hoefnagels, Marielle
McGraw-Hill, Higher Education, 2009
Buku Teks
Patterson, C.O. Pat, author
Burgess Publishing , 1973
Buku Teks
Bregman, Allyn A., author
John Wiley & Sons, 1983
Buku Teks
Gardner, Eldon J., author
Burgess, 1975
Buku Teks
by Lawrence W. Scott [and others]
Burgess, 1976
Buku Teks