Cita APA (7a ed.)

Johnson, V. M., & Werner, R. A. (1977). A step-by-step learning guide for older retarded children. Syracuse University Press.

Cita Chicago Style (17a ed.)

Johnson, Vicki M., y Roberta A. Werner. A Step-by-step Learning Guide for Older Retarded Children. Syracuse, N.Y.: Syracuse University Press, 1977.

Cita MLA (8a ed.)

Johnson, Vicki M., y Roberta A. Werner. A Step-by-step Learning Guide for Older Retarded Children. Syracuse University Press, 1977.