APA (7th ed.) Citation

Gabriels, J., & Mertens, A. (1941). De constanten in de Vlaamsche kunst. De Sikkel.

Chicago Style (17th ed.) Citation

Gabriels, Juliane, and Adriaan Mertens. De Constanten in De Vlaamsche Kunst. Antwerpen: De Sikkel, 1941.

MLA (9th ed.) Citation

Gabriels, Juliane, and Adriaan Mertens. De Constanten in De Vlaamsche Kunst. De Sikkel, 1941.