APA (7th ed.) Citation

Sobel, M. A. (1988). Readings for enrichment in secondary school mathematics. National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Sobel, Max A. Readings for Enrichment in Secondary School Mathematics. Reston, VA: National Council of Teachers of Mathematics, 1988.

MLA (9th ed.) Citation

Sobel, Max A. Readings for Enrichment in Secondary School Mathematics. National Council of Teachers of Mathematics, 1988.

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