Paperback
details (UK).(see also: Audible Audiobook · Audible Audiobook · Audio CD)
details (United States).(see also: Audible Audiobook · Audio CD)
details (Germany).(see also: Audible Hörbuch)
details (Canada).(see also: Audio CD)
ISBN: 978-0-14-001220-0
ISBN-10: 0-14-001220-6
Penguin · 1973