- ISBN: 978-3-330-65047-3

- ISBN: 978-3-330-65263-7

Qualitative Study for Family Member Employees

- ISBN: 978-3-639-76356-0

A Prospective Study

- ISBN: 978-613-8-59370-6

in the German, Austrian and Swiss Theme ParkIndustry

- ISBN: 978-613-8-91781-6

How to ask for the information you need to make any software project a success

- ISBN: 978-613-8-91782-3

- ISBN: 978-620-5-52236-3

- ISBN: 978-620-8-84765-4

Difficulties and Modified protocols

- ISBN: 978-3-639-66995-4

- ISBN: 978-3-639-76366-9