Nafziger, E. Wayne, author
Prentice-Hall, 1990
Buku Teks
Duke University Press, 1987
Buku Teks
Beeby, C. E., author
Harvard University Press, 1966
Buku Teks
National academy of sciences, 1973
Buku Teks
Riant Nugroho Dwidjowijoto, author
Pustaka Pelajar, 2012
Buku Teks