O'Connell, S., & SanGiovanni, J. (2015). Mastering the basic math facts in addition and subtraction: Strategies, activities & interventions to move students beyond memorization. Heinemann.
Chicago Style (17th ed.) CitationO'Connell, Susan, and John SanGiovanni. Mastering the Basic Math Facts in Addition and Subtraction: Strategies, Activities & Interventions to Move Students Beyond Memorization. Portsmouth, NH: Heinemann, 2015.
MLA (9th ed.) CitationO'Connell, Susan, and John SanGiovanni. Mastering the Basic Math Facts in Addition and Subtraction: Strategies, Activities & Interventions to Move Students Beyond Memorization. Heinemann, 2015.
Warning: These citations may not always be 100% accurate.