HARKNESS, S. P. (1976). Building Without Barries For The Disable Sarah P. Harkness And Jmaes N. Groom. Watson-Guptill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHARKNESS, Sarah P. Building Without Barries For The Disable Sarah P. Harkness And Jmaes N. Groom. Watson-Guptill, 1976.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHARKNESS, Sarah P. Building Without Barries For The Disable Sarah P. Harkness And Jmaes N. Groom. Watson-Guptill, 1976.
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