APA-viite (7. p.)

Headey, B. (2008). A quarter century of change: Results from the German Socio-Economic Panel (SOEP).

Chicago-viite (17. p.)

Headey, Bruce. A Quarter Century of Change: Results from the German Socio-Economic Panel (SOEP). Berlin, 2008.

MLA-viite (8. p.)

Headey, Bruce. A Quarter Century of Change: Results from the German Socio-Economic Panel (SOEP). 2008.