Collins, Jannette, author
Wolters Kluwer, 2008
Buku Teks
Broaded, Charley H., author
Harper & Brothers, 1947
Buku Teks
Wilmshurst, Linda, author
New Jersey, 2005
Buku Teks
edited by John A. Goldsmith
Blackwell , 1999
Buku Teks
Wiley-Blackwell, 2010
Buku Teks