by Richard R. Skemp
Paperback
details (United Kingdom).
(see also: eBook (Kindle))
details (USA).
(see also: eBook (Kindle))
details (Germany).
(see also: Kindle Ausgabe)
details (Canada).
(see also: eBook (Kindle))
ISBN: 978-0-14-021310-2
ISBN-10: 0-14-021310-4
Penguin Books · 1971