APA (7 वां संस्करण) प्रशस्ति पत्र

Muhammad Sodbir, H. (2012). The Effect of English Language Proficiency on the Social Capital and Academic Achievement of Economics Students in the Department of Economics, Universiti Utara Malaysia.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Muhammad Sodbir, Hamzah. The Effect of English Language Proficiency on the Social Capital and Academic Achievement of Economics Students in the Department of Economics, Universiti Utara Malaysia. 2012.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Muhammad Sodbir, Hamzah. The Effect of English Language Proficiency on the Social Capital and Academic Achievement of Economics Students in the Department of Economics, Universiti Utara Malaysia. 2012.

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