Haas, Kenneth B., author
Collier/Macmillan, 1974
Buku Teks
McDaniel, Carl, author
South Western Cengage Learning, 2012
Buku Teks
Still, Richard R., author
Prentice-Hall, 1966
Buku Teks
Edward L. Nash, editor in chief
McGraw-Hill , 1992
Buku Referensi
Norris, James S., author
Prentice-Hall, 1982
Buku Teks