Cita APA (7th ed.)

Duffy, G. G. (1990). Reading in the middle school (2a. ed.). International Reading Association.

Cita Chicago (17th ed.)

Duffy, Gerald G. Reading in the Middle School. 2a. ed. Newark: International Reading Association, 1990.

Cita MLA (9th ed.)

Duffy, Gerald G. Reading in the Middle School. 2a. ed. International Reading Association, 1990.