MacRae, C.F., author
Twayne, 1968
Buku Teks
Poe, Edgar Allan, author
Hill and Wang, 1960
Buku Teks
Young, Gordon
Winchester Press, 1970
Buku Teks
Mathematical Association of America, 1992
Buku Teks
Shillinglaw, Gordon, author
Richard D. Irwin, 1979
Buku Teks