Springhouse , 1999
Buku Teks
edited by Jaime L. Stockslager
Lippincott Williams & Wilkins, 2003
Buku Referensi
Appleton & Lange , 1989
Buku Teks
Tyson, Shirley Rose, author
Saunders , 1999
Buku Teks
edited by Kristen L. Mauk
Jones and Bartlett, 2010
Buku Teks