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Aerts, Diederick, Apostel, Leo, De Moor, Bart, Hellemans, Staff, Maex, Edel, Van Belle, Hubert, Van der Veken, Jan. 1994. "World views. From Fragmentation to Integration" . VUB Press. Translation of (Apostel and Van der Veken 1991) with some additions. – The basic book of World Views, from the Center Leo Apostel.

Apostel, Leo and Van der Veken, Jan. (1991) Wereldbeelden, DNB/Pelckmans.