APA (7th ed.) Citation

Beck, A., Bleicher, M. N., & Crowe, D. W. (1969). Excursions into mathematics. Worth Publishers.

Chicago Style (17th ed.) Citation

Beck, Anatole, Michael N. Bleicher, and Donald Warren Crowe. Excursions into Mathematics. New York: Worth Publishers, 1969.

MLA (9th ed.) Citation

Beck, Anatole, et al. Excursions into Mathematics. Worth Publishers, 1969.