Cita APA (7th ed.)

Nielsen, A. M. (1950). Economic and industrial geography. Pitman.

Cita Chicago (17th ed.)

Nielsen, Alfred Marius. Economic and Industrial Geography. New York: Pitman, 1950.

Cita MLA (9th ed.)

Nielsen, Alfred Marius. Economic and Industrial Geography. Pitman, 1950.

Atenció: Aquestes cites poden no estar 100% correctes.