Cita APA (7a ed.)

Johnson, V. M., & Werner, R. A. (1975). A step-by-step learning guide for retarded infants and children. Syracuse University Press.

Cita Chicago Style (17a ed.)

Johnson, Vicki M., y Roberta A. Werner. A Step-by-step Learning Guide for Retarded Infants and Children. Syracuse, N.Y.: Syracuse University Press, 1975.

Cita MLA (8a ed.)

Johnson, Vicki M., y Roberta A. Werner. A Step-by-step Learning Guide for Retarded Infants and Children. Syracuse University Press, 1975.