Altern

MLA

Rensing, Ludger, and Volkhard Rippe. Altern. Springer Berlin Heidelberg, 2014.

APA

Rensing, L., & Rippe, V. (2014). Altern. Springer Berlin Heidelberg.

Chicago

Rensing, Ludger, and Volkhard Rippe. Altern. : Springer Berlin Heidelberg, 2014.