Woerkom, A. J. J. v. (1948). On the origin of comets.
Chicago Style (17th ed.) CitationWoerkom, Adrianus Jan Jasper van. On the Origin of Comets. 1948.
MLA引文Woerkom, Adrianus Jan Jasper van. On the Origin of Comets. 1948.
警告：这些引文格式不一定是100％准确.
APA引文