Lambregs, J. J. (1981). "Op de purperen hei".
Chicago Style (17th ed.) CitationLambregs, Jos Juul. "Op De Purperen Hei". 1981.
MLA (8th ed.) CitationLambregs, Jos Juul. "Op De Purperen Hei". 1981.
Warning: These citations may not always be 100% accurate.