Artikel Jurnal
Coki Yunita Permana, author
Fakultas Teknik Universitas Indonesia, 1992
UI - Skripsi (Membership)
Piaget, Jean
Routledge & Kegan Paul, 1975
Buku Teks
Handfield, Toby, author
Cambridge University Press, 2012
Buku Teks
Epstein, Richard A., author
Academic Press, 1977
Buku Teks