McGrath, M. (2020). SQL in easy steps (Fourth edition.). In Easy Steps Limited.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMcGrath, Mike. SQL in Easy Steps. Fourth edition. Leamington Spa, Warwickshire: In Easy Steps Limited, 2020.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMcGrath, Mike. SQL in Easy Steps. Fourth edition. In Easy Steps Limited, 2020.
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