APA (7th ed.) Citation

Jong, L. d. (1973). The German fifth column in the Second World War. H. Fertig.

Chicago Style (17th ed.) Citation

Jong, L. de. The German Fifth Column in the Second World War. New York: H. Fertig, 1973.

MLA (9th ed.) Citation

Jong, L. de. The German Fifth Column in the Second World War. H. Fertig, 1973.