John Ray, John Belfour (1813). “A complete collection of English proverbs: also, the most celebrated proverbs of the Scotch, Italian, French, Spanish, and other languages”, p.50
"How the Hidden Dangers of Comparison Are Killing Us ... (and Our Daughters): The Measuring Stick Principle" by Ann Voskamp, www.huffingtonpost.com. November 8, 2013.