http://www.dfb.de/
List of German football transfers summer 2018List of German football transfers summer 2019List of German football transfers summer 2020List of German football transfers summer 2021List of German football transfers winter 2017–18List of German football transfers winter 2018–19List of German football transfers winter 2019–20List of German football transfers winter 2020–21
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List of German football transfers summer 2018List of German football transfers summer 2019List of German football transfers summer 2020List of German football transfers summer 2021List of German football transfers winter 2017–18List of German football transfers winter 2018–19List of German football transfers winter 2019–20List of German football transfers winter 2020–21