Meier, August
N.Y. Oxford University Press 1973, 1973
Buku Teks
[publisher not identified], 1977
Buku Teks
Bonnicksen, Andrea L
Mayfield Publishing Company, 1982
Buku Teks
Seelye, Elwyn E.
John Wiley & Sons, 1951
Buku Teks
Ranganathan, R.
Tata McGraw-Hill, 1990
Buku Teks