P.E. · P.P. · Peter E. · Peter P.
Heinemann · Urhobo Historical Society
| title | media type | ISBN-13 | year of publication |
|---|---|---|---|
| Social Exchange Theory: The Two Traditions | Paperback | 978-0-435-82275-0 | 1974 |
| Social Exchange Theory: The Two Traditions | " | 978-0-435-82276-7 | 1974 |
| Studies in Urhobo Culture | " | 978-978-067-768-8 | 2005 |
| Studies in Urhobo Culture | Hardcover | 978-978-067-769-5 | 2005 |