Cita APA (7a ed.)
Robison, H. F., & Schwartz, S. L. (1972). Learning at an early age: A programmed text for teachers : volume 1.
Cita estilo Chicago (17a ed.)
Robison, Helen F., y Sydney L. Schwartz. Learning at an Early Age: A Programmed Text for Teachers : Volume 1. 1972.
Cita MLA (9a ed.)
Robison, Helen F., y Sydney L. Schwartz. Learning at an Early Age: A Programmed Text for Teachers : Volume 1. 1972.
Precaución: Estas citas no son 100% exactas.