Paperback
details (UK).(see also: Audible Audiobook · eBook (Kindle) · Audio CD)
details (Germany).(see also: Audible Hörbuch · Kindle Ausgabe)
details (Canada).(see also: Audible Audiobook · Audible Audiobook)
ISBN: 978-0-14-003524-7
ISBN-10: 0-14-003524-9
Penguin Classics · 1973