Cita APA (7a ed.)

Phillips, B. A. (1912). Retardation in the elementary schools of Philadelphia. Univ. Pennsylvania.

Cita Chicago Style (17a ed.)

Phillips, Byron A. Retardation in the Elementary Schools of Philadelphia. Pennsylvania: Univ. Pennsylvania, 1912.

Cita MLA (9a ed.)

Phillips, Byron A. Retardation in the Elementary Schools of Philadelphia. Univ. Pennsylvania, 1912.