McGraw-Hill, 1982
Buku Teks
Hammond, John Lawrence, 1872-1949, author
Penguin Books, [1947]
Buku Teks
Clark, Anna, author
Rivers Oram, 1995
Buku Teks
Ware, Norman J
Russel & Russell, 1970
Buku Teks
Alger, Horatio
Horaito Alger Association of Distinguished America, 1991
Buku Teks