Guth, Hans P.
Belmott,
Buku Teks SO
edited by Michael W. Alssid and William Kenney
Holt, Rinehart and Winston, 1966
Buku Teks
Ida Sundari Husen
Rumah, 2008
Buku Teks
Rousseau, Jean-Jacques, 1712-1778
Librairie Larousse , 1937
Buku Teks
Chesterton, Gilbert Keith, 1874-1936
Collins Clesr-Type Press, 1939
Buku Teks