- ISBN: 978-613-8-90515-8

Principles and practice

- ISBN: 978-613-8-82980-5

- ISBN: 978-3-639-76872-5

Contacting the Occult World

- ISBN: 978-620-2-31365-0

Text, Theme & Framing in Selected West African Hausa Video Films

- ISBN: 978-613-8-94123-1

SOME DISCREPANCIES AND IMPROVEMENTS

- ISBN: 978-613-8-95851-2

RME as an instruction design perspective for introducing the derivative-integral relationship via distance education

- ISBN: 978-3-639-51316-5

- ISBN: 978-3-639-66557-4

- ISBN: 978-3-639-51832-0

- ISBN: 978-3-639-76721-6