變更

* Louis Spohr's Autobiography,作者：Louis Spohr<ref>https://books.google.com.hk/books?id=45E9AQAAMAAJ&pg=RA1-PA285&dq=Louis+Spohr%27s+autobiography&hl=zh-TW&sa=X&ved=0ahUKEwjF7KnXt_ngAhUXFogKHQK0B_kQ6AEIJzAA#v=onepage&q=Louis%20Spohr's%20autobiography&f=false</ref>* Louis Spohr: A Critical Biography 作者：Clive Brown <ref>https://books.google.com.hk/books?id=2MPXSVcdzPUC&printsec=frontcover&dq=Louis+Spohr&hl=zh-TW&sa=X&ved=0ahUKEwiWhpGfq_ngAhVJ_GEKHS3ZBUkQ6AEIJzAA#v=onepage&q=Louis%20Spohr&f=false</ref>