Janson, C. (1978). The Longitudinal approach: Problems and possibilities in the social sciences. Research report series.
Chicago-Zitierstil (17. Ausg.)Janson, Carl-Gunnar. "The Longitudinal Approach: Problems and Possibilities in the Social Sciences." Research Report Series 1978.
MLA-Zitierstil (8. Ausg.)Janson, Carl-Gunnar. "The Longitudinal Approach: Problems and Possibilities in the Social Sciences." Research Report Series, 1978.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.