Artikel Jurnal
Hulin, Charles L., author
Dow Jones-Irwin, 1983
Buku Teks
Pintanugra Persadanta, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2008
UI - Skripsi (Open)
Masitah, author
2012
UI - Tesis (Open)
O`connor, Joseph, author
Thorsons, 1997
Buku Teks