Could not answer
Hakikat Kitabevi, 1993
 Buku Teks
Monnerot, Jules
Sociology of communism
George Allen and Unwin, 1953
 Buku Teks
What Is Communism ?
edited by Richard M. Ketchum
Dutton , 1955
 Buku Teks
Schatten, Fritz
Communism in Africa
Frederick A. Praeger, 1966
 Buku Teks
Francisco, Juan R.
Philippine palaeography
Linguistic Society of The Philippines, 1973
 Buku Teks