Citazione Stile APA (7a Edizione)

Hess, A. L. (1977). Four-dimensional geometry: An introduction. National Council of Teachers of Mathematics.

Citazione stile Chigago Style (17a edizione)

Hess, Adrien L. Four-dimensional Geometry: An Introduction. Reston, VA: National Council of Teachers of Mathematics, 1977.

Citatione MLA (9a ed.)

Hess, Adrien L. Four-dimensional Geometry: An Introduction. National Council of Teachers of Mathematics, 1977.