Tohutoro APA (7th ed.)
Pipping, N. (1937). Über konvexe Figuren K 7.
Tohutoru Kātū Chicago (17th ed.)
Pipping, Nils. Über Konvexe Figuren K 7. Åbo, 1937.
Tohutoro MLA (9th ed.)
Pipping, Nils. Über Konvexe Figuren K 7. 1937.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.