Παραπομπή APA

Bell, R. J. T. (1944). Elementary treatise on coordinate geometry of three dimensions (23.).

Παραπομπή Chicago Style

Bell, Robert J T. Elementary Treatise on Coordinate Geometry of Three Dimensions. 23. Macmillan & Co. Ltd., London, 1944.

Παραπομπή MLA

Bell, Robert J T. Elementary Treatise on Coordinate Geometry of Three Dimensions. 23. 1944.