APA (7th ed.) Citation

Council of Europe, Robertson, A. H., & Landheer, B. (1955). Annuaire europeen: European yearbook. Nijhoff.

Chicago Style (17th ed.) Citation

Council of Europe, A. H. Robertson, and Bartholomeus Landheer. Annuaire Europeen: European Yearbook. The Hague: Nijhoff, 1955.

MLA (8th ed.) Citation

Council of Europe, et al. Annuaire Europeen: European Yearbook. Nijhoff, 1955.