* {{cita weblibro |url=http://www.oxforddnb.com/view/10.1093/ref:odnb/9780198614128.001.0001/odnb-9780198614128-e-53519 |sito|accessoautore=28Bruijn, marzoJ. T. P. de. 2012 2019|titolo=Ethé, (Carl) Hermann (1844–1917), orientalist |opera=Oxford Dictionary of National Biography |accesso=1 aprile 2019 |lingua=EN |DOI=10.1093/ref:odnb/53519 |cid=Oxford dictionary }}
* {{cita web |url=https://www.aber.ac.uk/en/is/library-services/collections/special-collections/ww1/ethe/ |titolo=Professor Hermann Ethé |editore=Aberystwyth University |accesso=28 marzo 2019 |lingua=EN}}
* {{cita web|url=https://www.aber.ac.uk/en/media/departmental/informationservices/pdf/Professor-Carl-Hermann-Eth%C3%A9.pdf |titolo=Professor Carl Hermann Ethé (1844-1917) and his experiences during the First World War |formato=PDF|accesso=28 marzo 2019|lingua=EN}}