Wing, Omar
Holt, Rinehart and Winston, 1972
Buku Teks
Standley, Gerald B.
Houghton Mifflin, 1971
Buku Teks SO
Streater, Jack W.
Howard W. Sains, 1969
Buku Teks SO
Pillage, Lawrence T.
McGraw-Hill , 1995
Buku Teks
Adby, P.R.
John Wiley & Sons, 1980
Buku Teks SO