Binggeli, Corky, author
New Jersey : Wiley, 2016
Buku Teks
Ching, Francis D.K., 1943-, author
John Wiley & Sons, 1987
Buku Teks
Massachusetts: Rockport Publishers,, 1997
Buku Teks
Ching, Francis D.K., 1943-, author
Erlangga, 1996
Buku Teks
Allen, Phyllis Sloan, author
Prentice-Hall, 2000
Buku Referensi