Achutegui, Pedro S. De
Ateneo de Manila, 1966
Buku Teks
Unamuno, Miguel de, author
Dover Publication, 1945
Buku Teks
Beistegui, Miguel de., author
Routledge, 1998
Buku Teks
Durkheim, Emile, author
George Allen and Unwin, 1954
Buku Teks
Strittmatter, Erwin
Berlin Der Kinderbuchverlag 1959
Buku Teks