APA (7th ed.) Citation

School Mathematics Study Group & Anderson, R. D. (1960). Studies in mathematics: Concepts of informal geometry. School Mathematics Study Group.

Chicago Style (17th ed.) Citation

School Mathematics Study Group and Richard D. Anderson. Studies in Mathematics: Concepts of Informal Geometry. [New Haven]: School Mathematics Study Group, 1960.

MLA (9th ed.) Citation

School Mathematics Study Group and Richard D. Anderson. Studies in Mathematics: Concepts of Informal Geometry. School Mathematics Study Group, 1960.