Παραπομπή σε μορφή APA (7η εκδ.)

Wilczynski, E. J. Projective differential geometry of curves and ruled surfaces. Chelsea.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wilczynski, Ernest Julius. Projective Differential Geometry of Curves and Ruled Surfaces. New York: Chelsea.

Παραπομπή σε μορφή MLA (8th εκδ.)

Wilczynski, Ernest Julius. Projective Differential Geometry of Curves and Ruled Surfaces. Chelsea.