Cita APA (7th ed.)
Hurwitz, A. B., Epstein, D. T., & Goddard, A. (1976). More number games: Mathematics made easy through play. Funk and Wagnalls.
Cita Chicago (17th ed.)
Hurwitz, Abraham B., David T. Epstein, i Arthur Goddard. More Number Games: Mathematics Made Easy Through Play. New York: Funk and Wagnalls, 1976.
Cita MLA (9th ed.)
Hurwitz, Abraham B., et al. More Number Games: Mathematics Made Easy Through Play. Funk and Wagnalls, 1976.
Atenció: Aquestes cites poden no estar 100% correctes.