Hamm 2012, p. 38: "'Alexander's Ragtime Band' was not Irving Berlin's first commercial hit; a dozen or more of his songs had chalked up substantial sheet music sales before it was published early in 1911. It was not his first song to attract international attention." Hamm, Charles (April 19, 2012). "Excerpt from Alexander and His Band". In Sears, Benjamin (ed.). The Irving Berlin Reader. Readers on American Musicians. New York: Oxford University Press (USA). pp. 38–52. ISBN978-0-19-538374-4 – via Google Books.