Analysis of information sources in references of the Wikipedia article "The Great Controversy (book)" in English language version.
Rather, he was always at pains to emphasize that Mrs. White herself acknowledged indebtedness in the book's Introduction:
The great events which have marked the progress of reform in past ages are matters of history, well known and universally acknowledged by the Protestant world; they are facts which none can gainsay. This history I have presented briefly, in accordance with the scope of the book, and the brevity which must necessarily be observed, the facts having been condensed into as little space as seemed consistent with a proper understanding of their application. In some cases where a historian has so grouped together events as to afford, in brief, a comprehensive view of the subject, or has summarized details in a convenient manner, his words have been quoted; but in some instances no specific credit has been given, since the quotations are not given for the purpose of citing that writer as authority, but because his statement affords a ready and forcible presentation of the subject. In narrating the experience and views of those carrying forward the work of reform in our own time, similar use has been made of their published works.Cf. The Great Controversy, p. xi.4 1911 edition.
Ellen G. White was not a plagiarist and her works did not constitute copyright infringement/piracy.
Rather, he was always at pains to emphasize that Mrs. White herself acknowledged indebtedness in the book's Introduction: