Umland, Jean B., author
Brooks/Cole, 1999
Buku Teks
Paradis, Jeffrey, author
McGraw-Hill, Higher Education, 2006
Buku Teks
Russo, Steve, author
Pearson Benjamin Cummings, 2007
Buku Teks
Paul, Martin A., author
Harcourt, Brace & World, 1967
Buku Teks
Andrews, Donald H., author
Wiley Eastern, 1965
Buku Teks