Moto, Keba, author
Lembaga Penelitian Universitas Indonesia, 2002
Artikel Jurnal
Herman Andreas, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2016
UI - Skripsi (Membership)
Barret, Jack
John Wiley & Sons, 1970
Buku Teks
Kondratyev, V., author
Foreign Languages Publishing House, 1967
Buku Teks
edited by Sir David Bates and Benjamin Bederson
Academic Press, 1982
Buku Teks