Rujukan Frederick_II_dari_Prusia

  1. ↑ Luvaas 1966, m/s. 3.
  2. ↑ Langer, William (1968), Western Civilization pp. 192–94
  3. ↑ Jews Welcome Coffee: Tradition and Innovation in Early Modern Germany Robert Liberles page 29
  4. ↑ Langer, William (1968), Western Civilization p. 193
  5. ↑ A History of Modern Germany: 1648–1840, Volume 1 Hajo Holborn, page 274
  6. ↑ Amos Elon (2002) The Pity Of It All. A History of Jews in Germany 1743–1933, pp. 2, 3. ISBN 0805059644