APA
Mahler W. R., . (1947). Twenty years of merit rating 1926-1946 : Selected and classified references from industry, business, Govt. and education experience & research. New York: Psychological Corporation.
Chicago
Mahler Walter R, . 1947. Twenty years of merit rating 1926-1946 : Selected and classified references from industry, business, Govt. and education experience & research. New York: Psychological Corporation.
Harvard
Mahler W. R., . (1947). Twenty years of merit rating 1926-1946 : Selected and classified references from industry, business, Govt. and education experience & research. New York: Psychological Corporation.
MLA
Mahler Walter R, . Twenty years of merit rating 1926-1946 : Selected and classified references from industry, business, Govt. and education experience & research. New York: Psychological Corporation. 1947.
