Miller, Richard L., author
John Wiley & Sons, 1986
Buku Teks
Roberts, Sue, author
Facet Publishing, 2008
Buku Teks
Francisco, Albert K., author
Addison-Wesley, 1984
Buku Teks
Lowe, G.B., author
South-Western Publishing, 1983
Buku Teks
Thompson, George C., author
Wadsworth, 1965
Buku Teks