Pollack, Merrill
Bobbs-Merrill, 1962
Buku Teks SO
edited by Edwin Seaver
World Pub., 1948
Buku Teks SO
edited by Oscar William; Illustrations and decorations by I. Rice Pereira [and others]
New American Library , 1957
Koleksi Publik
Nowlan, Alden
Richard D. Irwin, 1974
Buku Teks SO
Bowden, Edwin T.
Ohio State University Press, 1968
Buku Teks SO