APA (7th ed.) Citation

Young, W. H., & Young, G. C. (1972). The theory of sets of points (2. ed.). Chelsea.

Chicago Style (17th ed.) Citation

Young, W. H., and Grace Chisholm Young. The Theory of Sets of Points. 2. ed. Bronx [u.a.]: Chelsea, 1972.

MLA (9th ed.) Citation

Young, W. H., and Grace Chisholm Young. The Theory of Sets of Points. 2. ed. Chelsea, 1972.