Paperback
details (UK).(see also: eBook (Kindle) · Audible Audiobook · MP3 CD)
details (United States).(see also: eBook (Kindle) · Audible Audiobook · Audible Audiobook)
details (Germany).(see also: Kindle Ausgabe · Audible Hörbuch · MP3 CD)
details (Canada).(see also: Audible Audiobook)
ISBN: 978-0-330-26236-1
ISBN-10: 0-330-26236-X
Pan Books · 1981