McKenzie, James F., author
Jones and Bartlett, 2005
Buku Teks
Stanhope, Marcia, author
Mosby Year Book , 1992
Buku Teks
edited by Neil Bracht
SAGA Publications, 1999
Buku Teks
Grundy, Fred, author
HK Lewis, 1974
Buku Teks
edited by Robert D. Newcomb, Jerry L. Jolley
Charles C. Thomas, 1980
Buku Teks