Miller, Leslie H., author
Holt, Rinehart and Winston, 1961
Buku Teks
Peterson, John M.
Prindle, Weber & Schmidt Inc, 1971
Buku Teks
Schaaf, William L.
Wiley-Academy, 1965
Buku Teks
Barker, Forrest, author
Prentice-Hall, 1989
Buku Teks
Fowler, F. Parker, author
John Wiley & Sons, 1962
Buku Teks