Παραπομπή σε μορφή APA (7η εκδ.)

Whicher, O. (1971). Projective geometry: Creative polarities in space and time. Rudolf Steiner.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Whicher, Olive. Projective Geometry: Creative Polarities in Space and Time. London: Rudolf Steiner, 1971.

Παραπομπή σε μορφή MLA (9th εκδ.)

Whicher, Olive. Projective Geometry: Creative Polarities in Space and Time. Rudolf Steiner, 1971.