Mass Market Paperback
details (USA).(see also: eBook (Kindle) · Audible Audiobook · MP3 CD)
details (United Kingdom).(see also: eBook (Kindle) · MP3 CD · MP3 CD)
details (Germany).(see also: Kindle Ausgabe · CD-ROM · MP3 CD)
details (Canada).(see also: eBook (Kindle) · MP3 CD · Audible Audiobook)
ISBN: 978-0-671-70250-2
ISBN-10: 0-671-70250-5
Pocket Books · 1991