APA (7 वां संस्करण) प्रशस्ति पत्र
Laird, D. (1985). Approaches to training and development (2nd ed.). Addison-Wesley Pub. Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Laird, Dugan. Approaches to Training and Development. 2nd ed. Reading, Mass.: Addison-Wesley Pub. Co., 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Laird, Dugan. Approaches to Training and Development. 2nd ed. Addison-Wesley Pub. Co., 1985.
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