Head, R. V. A guide to packaged systems. Wiley-Interscience a division of John Wiley.
Lua i Stíl Chicago (17ú heag.)Head, Robert V. A Guide to Packaged Systems. New York: Wiley-Interscience a division of John Wiley.
Lua MLA (9ú heag.)Head, Robert V. A Guide to Packaged Systems. Wiley-Interscience a division of John Wiley.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.