Cita APA (7a ed.)

Richardson, H. W. (1969). Elements of regional economics (1st edition.). Penguin Books.

Cita Chicago Style (17a ed.)

Richardson, Harry W. Elements of Regional Economics. 1st edition. Londres: Penguin Books, 1969.

Cita MLA (8a ed.)

Richardson, Harry W. Elements of Regional Economics. 1st edition. Penguin Books, 1969.