Mathematical Association of America, ebrary, Inc, Wells, D., & Faires, J. D. (2008). The contest problem book IX: American Mathematics Competitions (AMC 12) 2001-2007. Mathematical Association of America.
Цитирование в стиле Чикаго (17-е изд.)Mathematical Association of America, Inc ebrary, Dave Wells, и J. Douglas Faires. The Contest Problem Book IX: American Mathematics Competitions (AMC 12) 2001-2007. Washington, D.C.: Mathematical Association of America, 2008.
Цитирование MLA (9-е изд.)Mathematical Association of America, et al. The Contest Problem Book IX: American Mathematics Competitions (AMC 12) 2001-2007. Mathematical Association of America, 2008.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.