Wheeler, Ruric E., author
Brook/Cole, 1969
Buku Teks
Chew, Al H.
Houghton Mifflin, 1976
Buku Teks
Paige, Donald D.
Prindle, Weber & Schmidt Inc., 1969
Buku Teks
Cleave, Cheryl
Prentice-Hall, 2002
Buku Teks
Krause, Eugene F.
Prentice-Hall, 1978
Buku Teks