Kinnane, Garry
Nelson, 1986
Buku Teks
Marek, George R.
Simon and Schuster, 1951
Buku Teks
edited by Leslie Stephen, Sidney Lee
Oxford University Press, 1950
Buku Referensi
Gamow, George
The American Library, 1965
Buku Teks
Craven, Paul R., author
Dickenson Publishing, 1968
Buku Teks