Wanlass, Lawrence C., author
Appleton-Century-Crofts, 1953
Buku Teks
Varma, S.P., author
Rajawali, 2010
Buku Teks
Sargent, Lyman Tower, author
The Dorsey Press, 1981
Buku Teks
Sabine, George H., author
Henry Holt, 1950
Buku Teks
Sabine, George H., author
Henry Holt , 1955, 1956
Buku Teks