Gaya APA

Stickels, T. (). Math puzzles and brainteasers, grades 6–8 : over 300 puzzles that teach math and problem-solving skills . United State of America: Jossey-Bass.

Gaya MLA

Stickels, Terry. "Math puzzles and brainteasers, grades 6–8 : over 300 puzzles that teach math and problem-solving skills". United State of America: Jossey-Bass, . Electronic Resource.