Freeman, M., & Ewan, C. (2014). Office for Learning and Teaching: SP13-3227. Office for Learning and Teaching.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFreeman, Mark, और Christine Ewan. Office for Learning and Teaching: SP13-3227. Office for Learning and Teaching, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFreeman, Mark, और Christine Ewan. Office for Learning and Teaching: SP13-3227. Office for Learning and Teaching, 2014.
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