Cita APA (7th ed.)

Sightseeŕs London: A map and a guide in one. Robert Nicholson.

Cita Chicago (17th ed.)

Sightseeŕs London: A Map and a Guide in One. London: Robert Nicholson.

Cita MLA (8th ed.)

Sightseeŕs London: A Map and a Guide in One. Robert Nicholson.

Atenció: Aquestes cites poden no estar 100% correctes.