Hole, C.B.
ELBS and Macmillan Education, 1997
Buku Teks SO
Kierszenbaum, Abraham L.
Elsevier Saunder, 2012
Buku Teks SO
Mader, Sylvia S.
Wm. C. Brown Publisher, 1993
Buku Teks SO
Johnson, Kenneth D.
The Benjamin, 1984
Buku Teks
Choinski, John S.
Wm.C. Brown Pub., 1992
Buku Teks SO