APA-čujuhus (7. p.)

(1963). Axiomatic projective geometry.

Chicago-čujuhus (17. p.)

Axiomatic Projective Geometry. 1963.

MLA-čujuhus (9. p.)

Axiomatic Projective Geometry. 1963.

Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.