APA (7th ed.) Citation

Ball, W. W. R., Petersen, J., Carslaw, . H. S., & Cajori, F. (1969). String figures and other monographs. Chelsea Publishing.

Chicago Style (17th ed.) Citation

Ball, W. W. R., J. Petersen, H. S. Carslaw, and F. Cajori. String Figures and Other Monographs. New York: Chelsea Publishing, 1969.

MLA (9th ed.) Citation

Ball, W. W. R., et al. String Figures and Other Monographs. Chelsea Publishing, 1969.