Pratt, Fletcher, 1897-1956
Pocket Books, 1948
Buku Teks
Hansen, Harry
A Mentor Book, 1961
Buku Teks
Mitchell, Joseph B. (Joseph Brady), 1915-
G.P. Putnam, 1955
Buku Teks
Roland, Charles P.
McGraw-Hill, 1991
Buku Teks
Thompson, William Fletcher, 1929-
Louisiana State University Pres, 1994
Buku Teks