[Geometrische figuren in achthoek]

MLA

De Paepe, Maurits. [geometrische Figuren In Achthoek]. 1899.

APA

De Paepe, M. (1899). [Geometrische figuren in achthoek]. .

Chicago

De Paepe, Maurits [geometrische Figuren In Achthoek].