APA Style

Ben-Chaim, D. et al (2012). Ratio and proportion : research and teaching in mathematics teachers' education (pre- and in-service mathematics teachers of elementary and middle school classes) . Rotterdam: SensePublishers.

MLA Style

Ben-Chaim, David. et al. "Ratio and proportion : research and teaching in mathematics teachers' education (pre- and in-service mathematics teachers of elementary and middle school classes)". Rotterdam: SensePublishers, 2012. Electronic Resource.