Cita APA (7a ed.)

Grimmel, A., & Giang, S. M. (2017). Solidarity in the European Union: A fundamental value in crisis. Springer.

Cita Chicago Style (17a ed.)

Grimmel, Andreas, y Susanne My Giang. Solidarity in the European Union: A Fundamental Value in Crisis. Cham, Switzerland: Springer, 2017.

Cita MLA (9a ed.)

Grimmel, Andreas, y Susanne My Giang. Solidarity in the European Union: A Fundamental Value in Crisis. Springer, 2017.