Col, Arthur Charles, 1886-
Mich., Scholarly Press, 1934
Buku Teks
Hansen, Harry, author
A Mentor Book, 1961
Buku Teks
Stern, Philip Van Doren
Fawcett Publications, 1961
Buku Teks
Mitchell, Joseph B. (Joseph Brady), 1915-, author
G.P. Putnam, 1955
Buku Teks
Pratt, Fletcher, 1897-1956, author
Pocket Books, 1948
Buku Teks