APA (7th ed.) Citation

Poortenaar, J. (1951). De papier wereld. In De Toren.

Chicago Style (17th ed.) Citation

Poortenaar, Jan. De Papier Wereld. In De Toren, 1951.

MLA (8th ed.) Citation

Poortenaar, Jan. De Papier Wereld. In De Toren, 1951.

Warning: These citations may not always be 100% accurate.