Smith, Bud, author
Dinastindo, 1993
Buku Teks
Artikel Jurnal
Fakultas Teknik Universitas Indonesia, 2003
UI - Skripsi (Membership)
Nestle Foundation
Nestle Foundation, 2004
Buku Teks
edited by Statistical Research and Training Institute
Japan Statistical Association, 2004
Buku Referensi