Lp. 18/-. sbn 7171 0233 5.
Originally published as 'De wijsbergeerte van de 20. eeuw', 4th ed. Baarn: Uitgeverij het Wereldvenster, 1963.
Twentieth-century philosophy by Bernard Delfgaauw. ISBN 0717102343. Published by Gill & Macmillan in 1969. Publication and catalogue information, links to buy online and reader comments.