McLenighan, V., & Zeleny, R. O. (1982). Christmas in Austria. World Book Encyclopedia.
Lua i Stíl Chicago (17ú heag.)McLenighan, Valjean, agus Robert O. Zeleny. Christmas in Austria. Chicago, Illinois: World Book Encyclopedia, 1982.
Lua MLA (8ú heag.)McLenighan, Valjean, agus Robert O. Zeleny. Christmas in Austria. World Book Encyclopedia, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.