Skeen, Kenneth C., author
Addison-Wesley, 1969
Buku Teks
Lerner, Joel J., author
McGraw-Hill , 1985
Buku Teks
Rassweiler, Merrill
Macmillan, 1952
Buku Teks
Maglio, Rodolfo
Macmillan, 1985
Buku Teks
Budnick, Frank S., author
McGraw-Hill, 1985
Buku Teks