Sayre, Wallace S., author
Barnes & Noble, 1964
Buku Teks
Posey, Rollin Bennett, author
Littlefield, Adam, 1958
Buku Teks
Jennings, Ivor, Sir, 1903-1965, author
Cambridge University Pers, 1951
Buku Teks
Fang, Tan, 1940-, author
Kuang Lu Pub. Service, 1985
Buku Teks
Crisp, L. F. (Leslie Finlay), author
Yale University Press, 1949
Buku Teks