Cita APA (7th ed.)

ebrary, Inc, Ashour, A. A., & Obada, A. -. F. (2001). Mathematics and the 21st century: Proceedings of the international conference, Cairo, Egypt, 15-20 January 2000. World Scientific.

Cita Chicago (17th ed.)

ebrary, Inc, A. A. Ashour, i A. -S. F. Obada. Mathematics and the 21st Century: Proceedings of the International Conference, Cairo, Egypt, 15-20 January 2000. Singapore ; River Edge, NJ: World Scientific, 2001.

Cita MLA (9th ed.)

ebrary, Inc, et al. Mathematics and the 21st Century: Proceedings of the International Conference, Cairo, Egypt, 15-20 January 2000. World Scientific, 2001.