Gaya APA

Martin, S. et al (2015). The Wacky & Wonderful World through number : over 2000 figures and facts . New York: Barron\'s Educational Series.

Gaya MLA

Martin, Steve. et al. "The Wacky & Wonderful World through number : over 2000 figures and facts". New York: Barron\'s Educational Series, 2015. Text.