Bell, R. J. T. (1959). Coordinate Geometry of Three Dimensions (3rd ed.). Macmillan and Co..
Cita Chicago (17th ed.)Bell, Robert J. T. Coordinate Geometry of Three Dimensions. 3rd ed. London: Macmillan and Co., 1959.
Cita MLA (9th ed.)Bell, Robert J. T. Coordinate Geometry of Three Dimensions. 3rd ed. Macmillan and Co., 1959.
Atenció: Aquestes cites poden no estar 100% correctes.