Cita APA (7th ed.)
Michael Boppel, S. B. From Grey to Silver: Managing the Demographic Change Successfully. Springer.
Cita Chicago (17th ed.)
Michael Boppel, Stephan Boehm. From Grey to Silver: Managing the Demographic Change Successfully. Berlín, Alemania: Springer.
Cita MLA (9th ed.)
Michael Boppel, Stephan Boehm. From Grey to Silver: Managing the Demographic Change Successfully. Springer.
Atenció: Aquestes cites poden no estar 100% correctes.