Baillie, James
Routledge, 2000
Buku Teks SO
Irvan Syah
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2011
UI - Skripsi Open
Mossner, Ernest Campbell
Columbia University Press, 1943
Buku Teks SO
edited by John K. Ryan
Catholic University of America Press, 1963
Buku Teks SO
Cohen, Morris R.
Henry Holt, 1949
Buku Teks SO