Maury Klein (1996). When New York Became the U.S. Media Capital, City Journal, From the Magazine Technology and Innovation, States and Cities, Economy, finance, and budgets, Arts and Culture, Summer 1996
Moses Yale Beach, An American inventor and newspaper entrepreneur, Moses Yale Beach (1800-1868) contributed to the technology of his time but was, above all, an important developer of popular journalism, Encyclopedia.com.
Lee, James Melvin (1917). STEAM EXPEESSES OF " THE SUN, History of American Journalism, Houghton Mifflin Company, Director of the Department of Journalism New York University, Chapter 9, p. 212