edited by Douglas G. Chapman
International Co-operation Publishing House, 1981
Buku Teks SO
Nam, Charles B.
Hoghton Mifflin., 1976
Buku Teks SO
Berry, Brian J.L.
ST Martin's Press, 1973
Buku Teks
edited by Edward Pohlman
New American Library, 1973
Buku Teks SO
Adiyanti Budi Utami
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1991
UI - Skripsi Membership