Universitas Indonesia, 2008
UI - Skripsi (Membership)
Draper, N.R.
John Wiley & Sons, 1981
Buku Teks
Chatterjee, Samprit
John Wiley & Sons, 1977`
Buku Teks
Weisberg, Sanford, 1947-
John Wiley & Sons, 1980
Buku Teks
Montgomery, Douglas C.
John Wiley & Sons, 1982
Buku Teks