Cita APA (7a ed.)

Ulmschneider, P. (2006). Intelligent Life in the Universe: Principles and Requirements Behind Its Emergence (2nd ed. 2006.). Springer Berlin Heidelberg : Imprint: Springer.

Cita Chicago Style (17a ed.)

Ulmschneider, Peter. Intelligent Life in the Universe: Principles and Requirements Behind Its Emergence. 2nd ed. 2006. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2006.

Cita MLA (8a ed.)

Ulmschneider, Peter. Intelligent Life in the Universe: Principles and Requirements Behind Its Emergence. 2nd ed. 2006. Springer Berlin Heidelberg : Imprint: Springer, 2006.