edited by Peggy L. Chinn
Maryland Aspen, 1986
Buku Teks
by Sally J. Redfern [and others]
Macmillan, 1982
Buku Teks
Kimmel, Allan J.
Blackwell Publishing, 2007
Buku Teks
Black, James A.
John Wiley & Sons, 1976
Buku Teks
Anderson, James A.
McGraw-Hill, 1987
Buku Teks