Cita APA (7a ed.)

Royal Geographical Society (Great Britain) & Institute of British Geographers. (1969). Area. Institute of British Geographers.

Cita Chicago Style (17a ed.)

Royal Geographical Society (Great Britain) y Institute of British Geographers. Area. London: Institute of British Geographers, 1969.

Cita MLA (9a ed.)

Royal Geographical Society (Great Britain) y Institute of British Geographers. Area. Institute of British Geographers, 1969.