The first idea :
how symbols, language, and intelligence evolved from our early primate ancestors to modern humans /
Stanley I. Greenspan, Stuart G. Shanker.
APA Citation
Greenspan, S. I., Shanker, S. (2004). The first idea: how symbols, language, and intelligence evolved from our early primate ancestors to modern humans. 1st Da Capo Press ed. Cambridge, Mass.: Da Capo Press.
MLA Citation
Greenspan, Stanley I, and Stuart Shanker. The First Idea: How Symbols, Language, And Intelligence Evolved From Our Early Primate Ancestors to Modern Humans. 1st Da Capo Press ed. Cambridge, Mass.: Da Capo Press, 2004.
Warning: These citations may not always be complete (especially for serials).