Goddard, R. (1990). Packaging materials. Pira.
Lua i Stíl Chicago (17ú heag.)Goddard, Ron. Packaging Materials. Surrey: Pira, 1990.
Lua MLA (9ú heag.)Goddard, Ron. Packaging Materials. Pira, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.