Cita APA

Greene, H. A., & Petty, W. T. (1985). Developing language skills: In the elementary school. Heredia, C.R.: Biblioteca UNA.

Citación estilo Chicago

Greene, Harry A., y Walter Thomas Petty. Developing Language Skills: In the Elementary School. Heredia, C.R.: Biblioteca UNA, 1985.

Cita MLA

Greene, Harry A., y Walter Thomas Petty. Developing Language Skills: In the Elementary School. Heredia, C.R.: Biblioteca UNA, 1985.