Cita APA (7th ed.)

Speech Communication Association & National Communication Association (U.S.). Communication education. Routledge.

Cita Chicago (17th ed.)

Speech Communication Association i National Communication Association (U.S.). Communication Education. Abingdon, Oxfordshire: Routledge.

Cita MLA (9th ed.)

Speech Communication Association i National Communication Association (U.S.). Communication Education. Routledge.