APA (7th ed.) Citation

Mahler, W. R. (1947). Twenty years of merit rating, 1926-1946 .. The Psychological corporation.

Chicago Style (17th ed.) Citation

Mahler, Walter R. Twenty Years of Merit Rating, 1926-1946 .. New York: The Psychological corporation, 1947.

MLA (9th ed.) Citation

Mahler, Walter R. Twenty Years of Merit Rating, 1926-1946 .. The Psychological corporation, 1947.