Buscemi, Santi V., author
McGraw-Hill , 2002
Buku Teks
Rentz, Mark D., author
Regents/Prentice Hall, 1992
Buku Referensi
Ford, Marjorie, author
Longman, 2001
Buku Teks
Archer, Jerome W., author
McGraw-Hill, 1966
Buku Teks
Archer, Jerome W., author
McGraw-Hill, 1966
Buku Teks