Astley, N. &. B. M. (2013). Ben and Holly's Little Kingdom: Ben Elf's Birthday. Ladybird.
Lua i Stíl Chicago (17ú heag.)Astley, Nevile & Baker Mark. Ben and Holly's Little Kingdom: Ben Elf's Birthday. England: Ladybird, 2013.
Lua MLA (8ú heag.)Astley, Nevile & Baker Mark. Ben and Holly's Little Kingdom: Ben Elf's Birthday. Ladybird, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.