Cita APA (7th ed.)

Oates, S. B. (1982). Let the trumpet sound: A life of Martin Luther King, Jr. HarperPerennial.

Cita Chicago (17th ed.)

Oates, Stephen B. Let the Trumpet Sound: A Life of Martin Luther King, Jr. New York: HarperPerennial, 1982.

Cita MLA (9th ed.)

Oates, Stephen B. Let the Trumpet Sound: A Life of Martin Luther King, Jr. HarperPerennial, 1982.