Roskam, I. & Lens, W., (2007). Introduction. Psychologica Belgica. 47(1), p.1. DOI: http://doi.org/10.5334/pb-47-1-1

Roskam I, Lens W. Introduction. Psychologica Belgica. 2007;47(1):1. DOI: http://doi.org/10.5334/pb-47-1-1

Roskam, I., & Lens, W. (2007). Introduction. Psychologica Belgica, 47(1), 1. DOI: http://doi.org/10.5334/pb-47-1-1

Roskam, Isabelle, and Willy Lens. 2007. Introduction 47, no. 1: 1. DOI: http://doi.org/10.5334/pb-47-1-1