| title | ISBN-13 | year of publication |
|---|---|---|
| African Historical Studies | 978-1-138-43246-8 | 2017 |
| Holy' Johnson, Pioneer of African Nationalism, 1836-1917 | 978-1-138-01095-6 | 2015 |
| 'Holy' Johnson, Pioneer of African Nationalism, 1836-1917 | 978-0-7146-1743-5 | 1970 |
| Nigerian Historical Studies | 978-0-7146-3113-4 | 1979 |