Walters, D. (1982). Chemistry. Franklin Watts.
Lua i Stíl Chicago (17ú heag.)Walters, Derek. Chemistry. London: Franklin Watts, 1982.
Lua MLA (9ú heag.)Walters, Derek. Chemistry. Franklin Watts, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.