APA (7e ed.) Bronvermelding

Boin, R., & Dijk, J. v. (1989). Volunteer labor supply in the Netherlands: A tobit approach. [Institute of Economic Research, Faculty of Economics, University of Groningen.

Chicago (17e ed.) Bronvermelding

Boin, Ronald, en Jouke van Dijk. Volunteer Labor Supply in the Netherlands: A Tobit Approach. Groningen: [Institute of Economic Research, Faculty of Economics, University of Groningen, 1989.

MLA (8e ed.) Bronvermelding

Boin, Ronald, en Jouke van Dijk. Volunteer Labor Supply in the Netherlands: A Tobit Approach. [Institute of Economic Research, Faculty of Economics, University of Groningen, 1989.