Hartley, B.
Chapman and Hall, 1992
Buku Teks
Myers, David G.
Worth Publishers, 2001
Buku Teks
Ellis, Janice Rider
Lippincott Williams & Wilkins, 2007
Buku Teks SO
edited by K.C. Gupta and Peter S. Hall
John Wiley & Sons, 2000
Buku Teks
edited by E. Jean Martin
Lippincott Williams & Wilkins, 2002
Buku Teks