Παραπομπή σε μορφή APA (7η εκδ.)

Lindenfeld, D. F. (1997). The practical imagination: The German sciences of state in the nineteenth century. University of Chicago Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Lindenfeld, David F. The Practical Imagination: The German Sciences of State in the Nineteenth Century. Chicago: University of Chicago Press, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Lindenfeld, David F. The Practical Imagination: The German Sciences of State in the Nineteenth Century. University of Chicago Press, 1997.