Sleeper, Harold Reeve, author
John Wiley & Sons, 1955
Buku Referensi
Carlson, Reinhold A., author
R.S. Means, 1991
Buku Teks
Srinivasan, A.V., 1936-, author
Cambridge University Press, 2001
Buku Teks
edited by Mel Schwartz
John Wiley & Sons, 2002
Buku Referensi
edited by Mel Schwartz
John Wiley & Sons, 2002
Buku Referensi