Fuchs, A. H. (2003). "Psychology as a science". Handbook of psychology. 1 (The history of psychology): 1–26. Unknown parameter |coauthors= ignored (|author= suggested) (bantuan)
Madigan, S. (1992). "Short-term memory at the turn of the century: Mary Whiton Calkin's memory research". American Psychologist. 47: 170–174. Unknown parameter |coauthors= ignored (|author= suggested) (bantuan)