APA (7th ed.) Citation

Gruver, H. L. (1968). School mathematics contests: A report. National Council of Teachers of Mathematics.

Chicago Style (17th ed.) Citation

Gruver, Howell L. School Mathematics Contests: A Report. Washington: National Council of Teachers of Mathematics, 1968.

MLA (9th ed.) Citation

Gruver, Howell L. School Mathematics Contests: A Report. National Council of Teachers of Mathematics, 1968.

Warning: These citations may not always be 100% accurate.