Cita APA (7th ed.)

Redfern, M. (2014). 50 Schlüsselideen Erde: Von Martin Redfern. Springer Berlin Heidelberg.

Cita Chicago (17th ed.)

Redfern, Martin. 50 Schlüsselideen Erde: Von Martin Redfern. Berlin, Heidelberg ;s.l.: Springer Berlin Heidelberg, 2014.

Cita MLA (8th ed.)

Redfern, Martin. 50 Schlüsselideen Erde: Von Martin Redfern. Springer Berlin Heidelberg, 2014.