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