APA (7th ed.) Citation

Jonckheere, K., Bodart, R., & Richter, H. (1968). Karel Jonckheere. Seghers.

Chicago Style (17th ed.) Citation

Jonckheere, Karel, Roger Bodart, and Hugo Richter. Karel Jonckheere. Paris: Seghers, 1968.

MLA (8th ed.) Citation

Jonckheere, Karel, et al. Karel Jonckheere. Seghers, 1968.