Paperback
details (UK).(see also: Audible Audiobook · eBook (Kindle) · Audio Cassette)
details (United States).(see also: Audible Audiobook · Audio Cassette · eBook (Kindle))
details (Germany).(see also: Kindle Ausgabe · Kindle Ausgabe)
details (Canada).(see also: eBook (Kindle) · Audio Cassette)
ISBN: 978-0-14-018493-8
ISBN-10: 0-14-018493-7
Penguin Classics · 1991