edited by Ingo Maurer
Laurence King Publishing, 2000
Buku Referensi
edited by Nathan Lyons
Prentice-Hall, 1966
Buku Teks
Giara Iman Nanda, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2014
UI - Skripsi (Membership)
Langford, Michael, author
Focal Press, 1998
Buku Teks
Busselle, Michael, author
RotoVision, 1998
Buku Teks