Hewitt, Paul G., author
Addison-Wesley, 2010
Buku Teks
edited by Dorothy A. Whyte
Routledge , 1997
Buku Teks
Drake, Richard L., author
Elsevier, 2014
Buku Teks
Wilde, Oscar
Laksana, 2015
Buku Teks
Sienko, Michell J., author
McGraw-Hill Kogakusha, 1961
Buku Teks