Cooper, C. L. (1982). Improving interpersonal relations: A guide to social skill development for managers and group leaders. Prentice Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCooper, Cary L. Improving Interpersonal Relations: A Guide to Social Skill Development for Managers and Group Leaders. Prentice Hall, 1982.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCooper, Cary L. Improving Interpersonal Relations: A Guide to Social Skill Development for Managers and Group Leaders. Prentice Hall, 1982.
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