APA (7th ed.) Citation

Luning Prak, J. (1933). De school in cijfers. Wolters.

Chicago Style (17th ed.) Citation

Luning Prak, J. De School in Cijfers. Groningen [etc.]: Wolters, 1933.

MLA (9th ed.) Citation

Luning Prak, J. De School in Cijfers. Wolters, 1933.