Lloyd Ch. Charles & Frazier J. A. James. (2011). Engineering; Teacher's Book. Newbury, Express Publishing, 2011.
Lua i Stíl Chicago (17ú heag.)Lloyd Ch. Charles agus Frazier J. A. James. Engineering; Teacher's Book. Newbury, Express Publishing, 2011, 2011.
Lua MLA (9ú heag.)Lloyd Ch. Charles agus Frazier J. A. James. Engineering; Teacher's Book. Newbury, Express Publishing, 2011, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.