Roman, Paul, author
Pergamon Press, 1975
Buku Teks
Patty, C. Wayne, author
PWS Publishing, 1993
Buku Teks
Mansfield, Maynard J., author
Robert E. Krieger, 1972
Buku Teks
Sims, Benjamin T., author
Macmillan, 1976
Buku Teks
Barr, Stephen, author
Thomas Y. Crowel, 1964
Buku Teks