Patilla, P. (1990). Multiplying. Kingfisher Books.
Lua i Stíl Chicago (17ú heag.)Patilla, Peter. Multiplying. London: Kingfisher Books, 1990.
Lua MLA (9ú heag.)Patilla, Peter. Multiplying. Kingfisher Books, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.