[Grondbeginselen, geometrische figuren ]

MLA

Gisland, Victor. [grondbeginselen, Geometrische Figuren ]. 1907.

APA

Gisland, V. (1907). [Grondbeginselen, geometrische figuren ]. .

Chicago

Gisland, Victor [grondbeginselen, Geometrische Figuren ].