APA (7 वां संस्करण) प्रशस्ति पत्र
FARMER, J., & GAST, D. (1991). SMALL GROUP INSTRUCTION FOR STUDENTS WITH SEVERE HANDICAPS: A STUDY OF OBSERVATIONAL LEARNING.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
FARMER, J.A, और D.L GAST. SMALL GROUP INSTRUCTION FOR STUDENTS WITH SEVERE HANDICAPS: A STUDY OF OBSERVATIONAL LEARNING. 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
FARMER, J.A, और D.L GAST. SMALL GROUP INSTRUCTION FOR STUDENTS WITH SEVERE HANDICAPS: A STUDY OF OBSERVATIONAL LEARNING. 1991.
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