Ewer, R.F.
Comstock , 1973
Buku Teks SO
edited by John L. Gittleman
Comstock , 1989
Buku Teks SO
Brissenden, R.F. [Robert Francis], 1928-1991
Published for the British Council and the National Book League by Longmans, Green, 1958
Buku Teks SO
Karmakar, Ayan
Springer Nature, 2019
eBooks
Sinambela, Joni
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2015
UI - Tesis Membership