McNeill, William H.
Prentice-Hall, 1990
Buku Teks SO
Stavrianos, Leften Stavros
Prentice-Hall, 1982
Buku Teks SO
Stavrianos, Leften Stavros
Prentice-Hall, c1988
Buku Teks SO
Ralby, Aaron
Parragon Books, 2013
Buku Referensi
McNeill, William H.
Prentice-Hall, 1990
Buku Referensi