Embree, Edwin R.
Viking Press , 1944
Buku Teks
Brown, Ina Corinne
Prentice-Hall, 1973
Buku Teks
Schrieke, Bertram Johannes Otto, author
Viking Press, 1936
Buku Teks
Brown, Ina Corinne
Harper, [1949]
Buku Teks
Pinkney, Alphonso
Prentice-Hall, 1975
Buku Teks