APA (7th ed.) Citation

Datta, L., & Perloff, R. (1979). Improving evaluations Sage focus editions.

Chicago Style (17th ed.) Citation

Datta, Lois-Ellin, and Robert Perloff. "Improving Evaluations." Sage Focus Editions 1979.

MLA (9th ed.) Citation

Datta, Lois-Ellin, and Robert Perloff. "Improving Evaluations." Sage Focus Editions, 1979.

Warning: These citations may not always be 100% accurate.