Smith, Charles Edward, author
Appleton-Century-Crofts, 1939
Buku Teks
Carter, Paul
Faber and Faber, 1987
Buku Teks
Glenn, Paul J.
B. Herder book co, 1950
Buku Teks
Shuter, Paul
Heineman Educational , 1988
Buku Teks
Philoponus, John
Cornell University, 1994
Buku Teks