Aurora Cuito, Alejandro Bahamón, Wendy Griswold
HBI, 2001
Buku Teks
edited by martin Nicholas Kunz
teNeues, 2003
Buku Teks
Crochet, Treena, author
Prentice-Hall, 1999
Buku Teks
edited by Roger L. Brockenbrough, Frederick S. Merrit
McGraw-Hill, 2011
Buku Teks
Roger L. Brockenbrough, Frederick S. Merritt, editor
McGraw-Hill, 2011
Buku Teks