by P. T. (Phineas Taylor) Barnum
by W. D. Wattles
by Russell H. Conwell
by Page Fox
by Orison Swett Marden
by Benjamin Franklin
by Elbert Hubbard
by Orison Swett Marden
by Abner Bayley, Orison Swett Marden
by Russell H. Conwell
by Harry A. Lewis
by Orison Swett Marden
by Katherine M. H. (Katherine Melvina Huntsinger) Blackford, Arthur Newcomb
by Norval A. Hawkins
by Russell H. Conwell
by Russell H. Conwell
by Orison Swett Marden
by Orison Swett Marden
by Russell H. Conwell
by Roger Ward Babson
by Ralph Albert Parlette
by Edward William Bok
by Warren Hilton
by Rosetta Dunigan
by Edward William Bok
by Nixon Waterman
by William Crosbie Hunter
by A. R. (Alfred Rochefort) Calhoun
by Baron Max Aitken Beaverbrook
by Charles Stewart Given
by Edward William Bok