Cita APA (7a ed.)
Dufek, J. Age structure and the burden carried by the productive population of the Czech Republic.
Cita Chicago Style (17a ed.)
Dufek, Jaroslav. Age Structure and the Burden Carried by the Productive Population of the Czech Republic.
Cita MLA (9a ed.)
Dufek, Jaroslav. Age Structure and the Burden Carried by the Productive Population of the Czech Republic.
Precaución: Estas citas no son 100% exactas.