Gaya APA

Stickels, T. (2009). Math Puzzles and Brainteasers, Grades 6-8 Over 300 Reproducible Puzzles that Teach Math and Problem Solving (link download : https://id1lib.org/dl/608960/4f3b5). USA: Jossey-Bass.

Gaya MLA

Stickels, Terry. "Math Puzzles and Brainteasers, Grades 6-8 Over 300 Reproducible Puzzles that Teach Math and Problem Solving". link download : https://id1lib.org/dl/608960/4f3b5 USA: Jossey-Bass, 2009. Electronic Resource.