APA (7th ed.) Citation

Anderson, R. D. (1960). Concepts of informal geometry (Prelim. ed.). SMSG.

Chicago Style (17th ed.) Citation

Anderson, Richard D. Concepts of Informal Geometry. Prelim. ed. [New Haven]: SMSG, 1960.

MLA (9th ed.) Citation

Anderson, Richard D. Concepts of Informal Geometry. Prelim. ed. SMSG, 1960.