McNabb, James W.
Wolters Kluwer, 2015
Buku Teks
Kahn, Michael A.
John Wiley & Sons, cop, 2014
Buku Teks
by Rob Herbert, Gro Jamtvedt, Judy Mead, and Kare Birger Hagen
Elsevier, 2005
Buku Teks
Kennedy, David
Bay Books, 1988
Buku Referensi
Stern, Scott D.C.
McGraw-Hill , 2015
Buku Teks