Engler, B. (1985). Personality Theories: An introduction (2nd ed.). Houghton Mifflin Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEngler, Barbara. Personality Theories: An Introduction. 2nd ed. Boston: Houghton Mifflin Company, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEngler, Barbara. Personality Theories: An Introduction. 2nd ed. Houghton Mifflin Company, 1985.
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