Schumm, Jeanne Shay, author
Freespirit Publishing, 1999
Buku Referensi
Muhammad Qhiffari Pradana, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2022
UI - Skripsi (Membership)
Adler, Mortimer Jerome, 1902-2001, author
iPublishing, 2007
Buku Teks
Dawe, Charles W.
Little, Brown and Company, c1984
Buku Teks
Ender, Steven C., author
Jossey-Bass Pub., 2000
Buku Referensi