Cita APA (7a ed.)
Billstein, R., Libeskind, S., & Lott, J. W. (1990). A problem solving approach to mathematics for elementary school teachers (4th ed.). Benjamin/Cummings.
Cita Chicago Style (17a ed.)
Billstein, Rick, Shlomo Libeskind, y Johnny W. Lott. A Problem Solving Approach to Mathematics for Elementary School Teachers. 4th ed. Redwood City, Calif.: Benjamin/Cummings, 1990.
Cita MLA (9a ed.)
Billstein, Rick, et al. A Problem Solving Approach to Mathematics for Elementary School Teachers. 4th ed. Benjamin/Cummings, 1990.
Precaución: Estas citas no son 100% exactas.