McCullough, Colleen
Arrow, 2000
Buku Teks
Boissohneau, Alice
Toronto Simon and Pierre 1983
Buku Teks
McCullough, David
Simon & Schuster, 1992
Buku Teks
Boissonneau, Alice
Simon & Pierre Pub. Co. , 1976
Buku Teks
Columbia University Press, 1959
Buku Teks