1. Bulletin of high points in the teaching of modern languages in the high schools of New York City: (V.[1]-2). (1917). New York: Board of Education. Retrieved on October 25, 2010 from www.hathitrust.org .
2. Butler, N. M. (1942). The war and modern language study. The Modern Language Journal, 26, 299–302.
3. Butler, N. M., Cutter, V. M., & Shepherd, W. R. (1934). The importance of the study of Spanish. Hispania, 14, 370–372.
4. Butler, S. (1935a). America’s armed forces—2. “In time of peace”: The army. Common Sense, 4(11), 8–12.
5. Butler, S. (1935b). America’s armed forces—3. “Happy days are here again”: The navy. Common Sense, 4(12), 10–14.