Παραπομπή APA

Barker, T. M. (1972). Fredarick the great and the making of Prussia.

Παραπομπή Chicago Style

Barker, Thomas M. Fredarick the Great and the Making of Prussia. New York, 1972.

Παραπομπή MLA

Barker, Thomas M. Fredarick the Great and the Making of Prussia. 1972.