Challenge to action

MLA

Cardijn, Jozef Leo, and Eugene Langdale. Challenge to Action. London: New life publications, 1955.

APA

Cardijn, J. Leo, & Langdale, E. (1955). Challenge to action. London: New life publications.

Chicago

Cardijn, Jozef Leo, Challenge to Action. Edited by Eugene Langdale. London: New life publications, 1955.