Ullmann, Leonard P.
Prentice-Hall, 1975
Buku Teks SO
Page, James Daniel
Tata McGraw-Hill, 1994
Buku Teks SO
Halgin, Richard P.
Harcourt Brace Jovanovich College, 1993
Buku Teks SO
edited by James E. Birren, R. Bruce Sloane
Prentice-Hall, 1980
Buku Teks SO
Alexander, Franz
The Falcon's Wing Press, 1956
Buku Teks