Population Institute, 1987
Majalah, Jurnal, Buletin
Universitas Indonesia, 2016
Buku Teks
Association for Computing Machinery
Society for Industrial and Applied Mathematics, 2005
eBooks
Stolpe, Sven
Charles Scribner's, 1966
Buku Teks
Teuku Mohammad Radhie
Yayasan Penelitian dan Pengembangan Hukum, 1976
Buku Teks