Paperback
details (UK).(see also: Audible Audiobook)
details (USA).(see also: Audible Audiobook · eBook (Kindle))
details (Germany).(see also: Audible Hörbuch · Kindle Ausgabe)
details (Canada).(see also: eBook (Kindle) · Audible Audiobook)
ISBN: 978-0-14-003942-9
ISBN-10: 0-14-003942-2
Penguin · 1976