Woerkom, A. J. J. v. (1948). On the origin of comets.
Chicagoスタイル(17版)引用形式Woerkom, Adrianus Jan Jasper van. On the Origin of Comets. 1948.
MLA(8版)引用形式Woerkom, Adrianus Jan Jasper van. On the Origin of Comets. 1948.
警告: この引用は必ずしも正確ではありません.
APA(7版)引用形式