edited by Frances Farmer
Oceana, 1956
Buku Teks SO
Link, Arthur S.
University of Pennsylvania Press , 1957
Buku Teks
Wanchope, R.S.
Calcutta General Print, 1933
Buku Teks
Fahma Wijayanti
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2001
UI - Tesis Membership
Lewis-Williams, David
Thames & Hudson, 2002
Buku Teks