Perry, James W.
Wadsworth, 1996
Buku Referensi
Strete, Dennis, author
McGraw-Hill, 2012
Buku Teks
Mader, Sylvia S., author
Wm. C. Brown Publisher, 1993
Buku Teks
Gartner, Leslie P., author
Lippincott Williams & Wilkins, 2007
Buku Teks
Hole, C.B., author
ELBS and Macmillan Education, 1997
Buku Teks