Johnson, W., Darley, F. L., & Spriestersbach, D. C. (1952). Diagnostic manual in speech correction: A professional training workbook. Harper & Brothers Pub.
Citazione stile Chigago Style (17a edizione)Johnson, Wendell, Frederic L. Darley, e D. C. Spriestersbach. Diagnostic Manual in Speech Correction: A Professional Training Workbook. New York: Harper & Brothers Pub, 1952.
Citatione MLA (9a ed.)Johnson, Wendell, et al. Diagnostic Manual in Speech Correction: A Professional Training Workbook. Harper & Brothers Pub, 1952.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.