Citazione Stile APA (7a Edizione)

Lockwood, J. R., & Runion, G. E. (1978). Deductive systems: Finite and non-euclidean geometries. National Council of Teachers of Mathematics.

Citazione stile Chigago Style (17a edizione)

Lockwood, James R., e G E. Runion. Deductive Systems: Finite and Non-euclidean Geometries. Reston, VA: National Council of Teachers of Mathematics, 1978.

Citatione MLA (9a ed.)

Lockwood, James R., e G E. Runion. Deductive Systems: Finite and Non-euclidean Geometries. National Council of Teachers of Mathematics, 1978.