APA (7th ed.) Citation

National Advisory Commitee & Apostol, T. M. (1989). The story of Pi. California Institute of Technology.

Chicago Style (17th ed.) Citation

National Advisory Commitee and Tom M. Apostol. The Story of Pi. Pasadena: California Institute of Technology, 1989.

MLA (9th ed.) Citation

National Advisory Commitee and Tom M. Apostol. The Story of Pi. California Institute of Technology, 1989.