MLA

Posamentier, Alfred S., Stephen Krulik, and Herbert A Hauptman. Problem-solving Strategies for Efficient and Elegant Solutions, Grades 6-12 : a Resource for the Mathematics Teacher. 2nd ed. Thousand Oaks (Cal.): Corwin Press, .200.

APA

Posamentier, A. S., Krulik, S., & Hauptman, H. A. (.200). Problem-solving strategies for efficient and elegant solutions, grades 6-12 : a resource for the mathematics teacher. 2nd ed. Thousand Oaks (Cal.): Corwin Press.

Chicago

Posamentier, Alfred S., Stephen Krulik, and Herbert A. Hauptman. Problem-Solving Strategies for Efficient and Elegant Solutions, Grades 6-12: A Resource for the Mathematics Teacher. 2nd ed. Thousand Oaks (Cal.): Corwin Press, .200.