APA (7th ed.) Citation

Zwikker, C. (1950). Advanced plane geometry. North-Holland.

Chicago Style (17th ed.) Citation

Zwikker, C. Advanced Plane Geometry. Amsterdam: North-Holland, 1950.

MLA (9th ed.) Citation

Zwikker, C. Advanced Plane Geometry. North-Holland, 1950.

Warning: These citations may not always be 100% accurate.