Paperback
details (USA).(see also: Audible Audiobook · eBook (Kindle))
details (UK).(see also: Audible Audiobook · eBook (Kindle))
details (Germany).(see also: Kindle Ausgabe)
details (Canada).(see also: Audible Audiobook · eBook (Kindle))
ISBN: 978-0-590-41057-1
ISBN-10: 0-590-41057-1
Scholastic · 1987