Παραπομπή σε μορφή APA (7η εκδ.)

Williams, R. P. (1979). The geometrical foundation of natural structure: A source book of design. Dover Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Williams, Robert P. The Geometrical Foundation of Natural Structure: A Source Book of Design. New York: Dover Publications, 1979.

Παραπομπή σε μορφή MLA (8th εκδ.)

Williams, Robert P. The Geometrical Foundation of Natural Structure: A Source Book of Design. Dover Publications, 1979.