APA (7th ed.) Citation

Coperthwaite, W. S. (1973). The concentric yurt: Twenty two foot diameter. [Yurt Foundation].

Chicago Style (17th ed.) Citation

Coperthwaite, William S. The Concentric Yurt: Twenty Two Foot Diameter. Bucks Harbor, Maine: [Yurt Foundation], 1973.

MLA (9th ed.) Citation

Coperthwaite, William S. The Concentric Yurt: Twenty Two Foot Diameter. [Yurt Foundation], 1973.