MLA

Mark Griffiths, Tobias Hayer, Gerhard Meyer, et al. Problem Gambling In Europe. Springer New York, 2009.

APA

Mark Griffiths, G. Meyer, Griffiths, M., Hayer, T., & Meyer, G. (2009). Problem Gambling in Europe. Springer New York.

Chicago

Mark Griffiths, Tobias Hayer, Gerhard Meyer., Mark Griffiths, Tobias Hayer, and Gerhard Meyer. Problem Gambling In Europe. : Springer New York, 2009.