APA Style
      GmbH, D, G, F, I, Z, (. (2025).
    Sustainable Aging: Cases and Cooperation in China and Germany .
    Heidelberg:
  Springer Berlin, Heidelberg.
  
MLA Style
      GmbH, Deutsche, Gesellschaft, Für, Internationale, Zusammenarbeit, (GIZ).
    "Sustainable Aging: Cases and Cooperation in China and Germany".
    
    Heidelberg:
  Springer Berlin, Heidelberg,
  2025.
  Text.