Cita APA (7a ed.)

Janson, C. (1978). The Longitudinal approach: Problems and possibilities in the social sciences. Research report series.

Cita Chicago Style (17a ed.)

Janson, Carl-Gunnar. "The Longitudinal Approach: Problems and Possibilities in the Social Sciences." Research Report Series 1978.

Cita MLA (8a ed.)

Janson, Carl-Gunnar. "The Longitudinal Approach: Problems and Possibilities in the Social Sciences." Research Report Series, 1978.