Paperback
details (USA).(see also: Audible Audiobook · eBook (Kindle) · Audio Cassette)
details (UK).(see also: CD-ROM · Audio CD · Audible Audiobook)
details (Germany).(see also: CD-ROM · Kindle Ausgabe · Audio CD)
ISBN: 978-0-439-65527-9
ISBN-10: 0-439-65527-7
Scholastic · 1970