Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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