APA (7th ed.) Citation

Smith Douglas B. & Topp William R. (1981). An activity approach to elementary concepts of mathematics. Addison-Wesley.

Chicago Style (17th ed.) Citation

Smith Douglas B. and Topp William R. An Activity Approach to Elementary Concepts of Mathematics. Addison-Wesley, 1981.

MLA (8th ed.) Citation

Smith Douglas B. and Topp William R. An Activity Approach to Elementary Concepts of Mathematics. Addison-Wesley, 1981.

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