Allport, G. W., & Vernon, P. E. (1960). A study of values. Boston, Mass: Houghton-Mifflin. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Allport, G. W., & Vernon, P. E. (1960). A study of values. Boston, Mass: Houghton-Mifflin. [FULLTEXT]