APA (7th ed.) Citation

School Mathematics Study Group. (1961). Intuitive geometry (Prelim. ed.). SMSG.

Chicago Style (17th ed.) Citation

School Mathematics Study Group. Intuitive Geometry. Prelim. ed. [New Haven]: SMSG, 1961.

MLA (9th ed.) Citation

School Mathematics Study Group. Intuitive Geometry. Prelim. ed. SMSG, 1961.

Warning: These citations may not always be 100% accurate.