introduction by Edward G. Smith
Barnes & Noble, 1966
Buku Teks
Dumbauld, Edward, author
University of Oklahoma Press, 1946
Buku Teks
Antieau, Chester James, author
Dennis & Co., 1960
Buku Teks
Hamilton, Alexander, author
Tudor Publishing, 1937
Buku Teks
United States Information Agency, 1987
Buku Teks