Lockwood, J. R., & Runion, G. E. (1978). Deductive systems: Finite and non-euclidean geometries. National Council of Teachers of Mathematics.
Цитирование в стиле Чикаго (17-е изд.)Lockwood, James R., и G E. Runion. Deductive Systems: Finite and Non-euclidean Geometries. Reston, VA: National Council of Teachers of Mathematics, 1978.
Цитирование MLA (9-е изд.)Lockwood, James R., и G E. Runion. Deductive Systems: Finite and Non-euclidean Geometries. National Council of Teachers of Mathematics, 1978.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.