Gwynne, P., & Jeffries, B. (1994). Energy and physics. Time Life Asia.
Lua i Stíl Chicago (17ú heag.)Gwynne, Peter, agus Brian Jeffries. Energy and Physics. U.S.A.: Time Life Asia, 1994.
Lua MLA (9ú heag.)Gwynne, Peter, agus Brian Jeffries. Energy and Physics. Time Life Asia, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.