Rini Pudji Lestari
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1994
UI - Skripsi (Membership)
edited by J.A. Bondy, U.S. Murty
Academic Press, 1979
Buku Teks
Academic Press, 1983
Buku Teks
Academic Press , 1988
Buku Teks
Gould, Ronald
The Benjamin Cumming , 1988
Buku Teks