APA Style
Gregorovius, Ferdinand. (1903).
The Tombs of the Popes: Landmarks in Papal History .
Westminster:
Archibald Constable & Co Ltd.
Chicago Style
Gregorovius, Ferdinand.
The Tombs of the Popes: Landmarks in Papal History.
Westminster:
Archibald Constable & Co Ltd,
1903.
Text.
MLA Style
Gregorovius, Ferdinand.
The Tombs of the Popes: Landmarks in Papal History.
Westminster:
Archibald Constable & Co Ltd,
1903.
Text.
Turabian Style
Gregorovius, Ferdinand.
The Tombs of the Popes: Landmarks in Papal History.
Westminster:
Archibald Constable & Co Ltd,
1903.
Print.