Ouellette, Robert P., author
Petrocelli/Charter, 1975
Buku Teks SO
Porteous, Andrew, author
John Wiley & Sons, 1992
Buku Referensi
Henry W. Art, general editor ; foreword by F. Herbert Bormann ; contributing editors, Daniel Botkin [and others]
Henry Holt, 1993
Buku Referensi
Honachefsky, William B., author
Noyes Pub., 1991
Buku Referensi
Sawyer, Clair N., author
McGraw-Hill, 2003
Buku Teks