Não informado. (1956). Package Engineering. Cahners Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Package Engineering. Des Plaines, Ill: Cahners Publishing, 1956.
Lua MLA (8ú heag.)Não informado. Package Engineering. Cahners Publishing, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.