Malone, Leo J., author
John Wiley & Sons, 1981
Buku Teks
Sherman, Alan, author
Houghton Mifflin, 1992
Buku Teks
Malone, Leo J., author
John Wiley & Sons, 1994
Buku Teks
Malone, Leo J., author
John Wiley & Sons, 1981
Buku Teks
Michels, Leo, author
Brooks/Cole, 1996
Buku Teks