Schelling, F. W. J. v., & Wirth, J. M. (2000). The ages of the world. State University of New York Press.

Schelling, Friedrich Wilhelm Joseph von, and Jason M. Wirth. The Ages of the World. Albany: State University of New York Press, 2000.

Schelling, Friedrich Wilhelm Joseph von, and Jason M. Wirth. The Ages of the World. State University of New York Press, 2000.