Peters, N. R. (1989). The Graue Familie: A history of the Graue family of the Kingdom of Hannover. Gateway [in Komm.].
Lua i Stíl Chicago (17ú heag.)Peters, Norman Ralph. The Graue Familie: A History of the Graue Family of the Kingdom of Hannover. Baltimore: Gateway [in Komm.], 1989.
Lua MLA (8ú heag.)Peters, Norman Ralph. The Graue Familie: A History of the Graue Family of the Kingdom of Hannover. Gateway [in Komm.], 1989.
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