Kreuzer, James R., author
Holt, Rinehart and Winston, 1964
Buku Teks
Kreuzer, James R., author
Holt, Rinehart and Winston, 1966
Buku Teks
Greenberg, Florence Bonzer, author
The Bobbs-Merrill, 1967
Buku Teks
Corbett, Edward P.J., author
Scott, Foresman and Company, 1983
Koleksi Publik
Harper, 1961
Buku Teks