Hill, T. J. (1974). Mathematical challenges II, plus six: Selected problems from the Mathematics student journal. National Council of Teachers of Mathematics.
Chicago Style (17th ed.) CitationHill, Thomas J. Mathematical Challenges II, Plus Six: Selected Problems from the Mathematics Student Journal. Reston, Va.: National Council of Teachers of Mathematics, 1974.
MLA (9th ed.) CitationHill, Thomas J. Mathematical Challenges II, Plus Six: Selected Problems from the Mathematics Student Journal. National Council of Teachers of Mathematics, 1974.
Warning: These citations may not always be 100% accurate.