editor, Robert E. Egner; penerjemah, Rani Rahmanillah
Sadasiva, 2003
Buku Teks SO
Herminie Soemitro
Universitas Indonesia, 1989
UI - Skripsi Membership
A. Abbas Arby
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2005
UI - Tesis Membership
Dorward, Alan
Britsh Council, 1951
Buku Teks SO
Albertus Heriyanto
Universitas Indonesia, 1996
UI - Tesis Membership