School Specialty Publishing (Firm). (2006). Inventions & discoveries. School Specialty Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchool Specialty Publishing (Firm). Inventions & Discoveries. Columbus, Ohio: School Specialty Pub., 2006.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSchool Specialty Publishing (Firm). Inventions & Discoveries. School Specialty Pub., 2006.
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