Chruden, Herbert J., author
South-Western Publishing, 1976
Buku Teks
by Herbert G. Henemen III ... [et.al.]
Richard D. Irwin, 1989
Buku Teks
Odiorne, George S., author
Dow Jones-Irwin, 1982
Buku Teks
Chruden, Herbert J., author
South-Western, 1966
Buku Teks
Strauss, George, author
Prentice-Hall, 1980
Buku Teks