APA (7th ed.) Citation

Billstein, R., Libeskind, S., & Lott, J. W. (1990). A Problem solving approach to mathematics for elementary schools teachers. The Benyamin.

Chicago Style (17th ed.) Citation

Billstein, Rick, Shlomo Libeskind, and Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary Schools Teachers. The Benyamin, 1990.

MLA (8th ed.) Citation

Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary Schools Teachers. The Benyamin, 1990.