Sperl, D. H. (1933). The case method technique in professional training. Columbia University.
Cita Chicago Style (17a ed.)Sperl, Diana Henryetta. The Case Method Technique in Professional Training. New York: Columbia University, 1933.
Cita MLA (8a ed.)Sperl, Diana Henryetta. The Case Method Technique in Professional Training. Columbia University, 1933.
Precaución: Estas citas no son 100% exactas.