^Lucas, Jay (24 أكتوبر 1983). "Dragon's Keep, learning game for first graders". InfoWorld. ج. 5 رقم 43. ص. 39. مؤرشف من الأصل في 2020-02-07. اطلع عليه بتاريخ 2016-06-14. Dragon's Keep is a graphic adventure originally designed by Al and Margaret Lowe and Micheal and Rae Lynn MacChesnet . Originally they worked under the corporate name of Sunnyside Soft.
^Mace, Scott (17 يناير 1983). "Neighbors from game-software firm". InfoWorld. ج. 5 رقم 3. ص. 16. مؤرشف من الأصل في 2020-02-07. اطلع عليه بتاريخ 2016-06-14. The company is Sunnyside Soft, which last month released two educational games for the Apple, Dragon's Keep and Bop-A-Bet. . Al Lowe is head programmer
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