Paperback
details (UK).(see also: Audible Audiobook · Audible Audiobook · Audio Cassette)
details (USA).(see also: Audible Audiobook · Audible Audiobook · Audio CD)
details (Germany).(see also: Audible Hörbuch · CD-ROM · Audio CD)
details (Canada).(see also: Audio CD · Audible Audiobook · Audible Audiobook)
ISBN: 978-0-14-002570-5
ISBN-10: 0-14-002570-7
Penguin · 1973