Watson, J. L. (1988). Symmetrical English 1 ... c5. Macmillan.
Lua i Stíl Chicago (17ú heag.)Watson, John L. Symmetrical English 1 ... C5. New York: Macmillan, 1988.
Lua MLA (9ú heag.)Watson, John L. Symmetrical English 1 ... C5. Macmillan, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.