Second Edition

- ISBN: 978-620-9-65853-2

When Clients, Instead of Service Providers, Take the Lead Second Edition

- ISBN: 978-620-9-65087-1

Second Edition

- ISBN: 978-620-9-66521-9

Formulations, Applications

- ISBN: 978-620-8-43267-6

The State of the Art

- ISBN: 978-620-8-43417-5

When Clients, Instead of Service Providers, Take the Lead

- ISBN: 978-3-659-74151-7

- ISBN: 978-620-8-11908-9

- ISBN: 978-620-8-06592-8

Happiness at work

- ISBN: 978-620-8-41983-7

An examination of public perceptions to native languages in eduction today

- ISBN: 978-3-8443-3409-8