Stillman, Richard N.
Holt, Rinehart and Winston, 1962
Buku Teks
Crane, Burton
Simon and Schuster , 1959
Buku Teks
Krow, Harvey A.
Random House , 1969
Buku Teks
Anderson, Frank Russel, author
John Wiley & Sons, 1978
Buku Teks
Pierce, Phyllis S.
Irwin, 1996
Buku Referensi