APA (7th ed.) Citation

Young, W. H., & Young, G. C. (1906). The theory of sets of points. Univ. Press.

Chicago Style (17th ed.) Citation

Young, William H., and Grace Chisholm Young. The Theory of Sets of Points. Cambridge: Univ. Press, 1906.

MLA (9th ed.) Citation

Young, William H., and Grace Chisholm Young. The Theory of Sets of Points. Univ. Press, 1906.