Foreign Languages Publishing House, 1958
Buku Teks
Davison, Frank Dalby, 1983-1970, author
Angus & Robertson Publishers, 1985.
Buku Teks
Umar Kayam, author
Heinemann Educational Books, 1980
Buku Teks
Unamuno, Miguel de, author
Gateway Editions; distributed by H. Regnery Co, 1956
Buku Teks
Dalisay, Jose Y.
University of the Philippines Press , 1996
Buku Teks