Birger Sivertsen

Caro Babbo Natale. Le più belle lettere mai scritte a Babbo Natale  Birger Sivertsen Einaudi Ragazzi, 2012 ISBN 9788866560371     Dear Santa: The Best Letters Ever Written to Father Christmas  Birger Sivertsen Paperback. John Blake, 2013-08-01 ISBN 9781843585053     Dear Santa: The Best Letters Ever Written to Father Christmas  Birger Sivertsen Hardcover. John Blake, 2011-10-01 ISBN 9781843582502