Klein, U., & Kugler-Euerle, G. (2014). Balancing freedom and safety: Schwerpunktthema: Challenges and choices in an insecure world (Focus USA). Schöningh.
Citazione stile Chigago Style (17a edizione)Klein, Ulrike, e Gabriele Kugler-Euerle. Balancing Freedom and Safety: Schwerpunktthema: Challenges and Choices in an Insecure World (Focus USA). Paderborn: Schöningh, 2014.
Citatione MLA (9a ed.)Klein, Ulrike, e Gabriele Kugler-Euerle. Balancing Freedom and Safety: Schwerpunktthema: Challenges and Choices in an Insecure World (Focus USA). Schöningh, 2014.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.