| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Mutual Aid: A Factor of Evolution | 978-1-4065-3655-3 (1-4065-3655-5) | 2007 |
| Mutual Aid: a factor of evolution | 978-1-4264-1459-6 (1-4264-1459-5) | 2006 |
P.K. · Peter A. Kropotkin · Peter Kropotkin · Petr Alekseevich, KnIAZ, Kropotkin · Petr Alekseevich Kropotkin · Petr Kropotkin · Piotr Alekseevich Kropotkin