APA (7th ed.) Citation

Haag, V. (1986). Challenge: A program for the mathematically talented (Teacher's ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Haag, Vincent. Challenge: A Program for the Mathematically Talented. Teacher's ed. Menlo Park, Calif: Addison-Wesley, 1986.

MLA (9th ed.) Citation

Haag, Vincent. Challenge: A Program for the Mathematically Talented. Teacher's ed. Addison-Wesley, 1986.