Cita APA (7a ed.)

Buhr, P., Engelbert, A., & Kaufmann, F. (1989). Childhood in the Federal Republic of Germany: Trends and facts. IBS-Materialien.

Cita Chicago Style (17a ed.)

Buhr, Petra, Angelika Engelbert, y Franz-Xaver Kaufmann. "Childhood in the Federal Republic of Germany: Trends and Facts." IBS-Materialien 1989.

Cita MLA (9a ed.)

Buhr, Petra, et al. "Childhood in the Federal Republic of Germany: Trends and Facts." IBS-Materialien, 1989.