Ashley, Ruth, author
John Wiley & Sons, 1980
Buku Teks
Michels, Leo, author
Brooks/Cole, 1996
Buku Teks
Michels, Leo, author
Brooks/Cole, 1993
Buku Teks
Bavel, Zamir, author
Reston, 1982
Buku Teks
Gibilisco, Stan, 1953-, author
McGraw-Hill, 2013
Buku Teks