Paperback
details (United States).(see also: Audible Audiobook · CD-ROM · eBook (Kindle))
details (UK).(see also: eBook (Kindle) · Audible Audiobook · CD-ROM)
details (Germany).(see also: Audible Hörbuch · Kindle Ausgabe · CD-ROM)
details (Canada).(see also: eBook (Kindle) · CD-ROM · Audio CD)
ISBN: 978-0-671-45543-9
ISBN-10: 0-671-45543-5
Pocket · 1982