MLA

Hammaas, H, et al. Leizure Research In Europe : Methods and Traditions. Wallingford: CAB International, 1996.

APA

Hammaas, H., van der Poel, H., Bramham, P., & Henry, I. (1996). Leizure research in Europe : methods and traditions. Wallingford: CAB International.

Chicago

Hammaas, H., H van der Poel, P Bramham, and I Henry. Leizure Research In Europe: Methods and Traditions. Wallingford: CAB International, 1996.