APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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