"Rupert Murdoch's "News Corporation (now "News Corp) acquired Harper & Row in 1987, and "William Collins, Sons in 1990. The names of these two national publishing houses (Harper & Row in the United States and Collins in the United Kingdom) were combined (along with the Harper's torch icon and Collins' fountain icon) to create "HarperCollins, which has since expanded its international reach with further acquisitions of formerly independent publishers. The Harper imprint began being used in place of HarperCollins in 2007.
After the purchase of Harper & Row by "News Corporation, HarperCollins launched a new mass market paperback line to complement its existing trade paperback "Perennial imprint. It was known as Harper Paperbacks from 1990 to 2000, HarperTorch from 2000 to 2006, and Harper from 2007 to the present.
- "HARPER & BROS. REORGANIZE.; G.B.M. Harvey, Editor and Proprietor of The North American Review, Elected President of the Firm.". 17 November 1899. Retrieved 26 August 2016 – via NYTimes.com.
- "CASS CANFIELD, A TITAN OF PUBLISHING, IS DEAD AT 88". The New York Times. 28 March 1986. Retrieved 26 August 2016.
- "The New York Times: Sunday June 27, 1943". Retrieved 26 August 2016.
- "The New York Times: Thursday November 6, 1958". Retrieved 26 August 2016.
- "Harper Lee, Author of 'To Kill a Mockingbird,' Is to Publish a Second Novel". The New York Times. 4 February 2015. Retrieved 26 August 2016.
- "Jacob Abbott (1855), The Harper Establishment, New York: Harper & Brothers, "OCLC 6798043
- Barnes, James J. "Edward Lytton Bulwer and the Publishing Firm of Harper & Brothers." American Literature (1966): 35-48. in JSTOR
- D'Amato, Martina. "'The Harper Establishment'; or, How a New York Publishing Giant Was Made."
- Exman, Eugene. The brothers Harper: a unique publishing partnership and its impact upon the cultural life of America from 1817 to 1853 (Harper & Row, 1965)
- Eugene Exman (1967), The House of Harper, NY: Harper & Row, "OCLC 586430
- J. Henry Harper (1912), The House of Harper: a century of publishing in Franklin Square, New York: Harper
- Harper & Brothers' List of Publications, New York: Harper & Brothers, 1859
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