Cita APA (7a ed.)
Gallup, G., & O'Connell, G. (1986). Who do Americans say that l am ? Westminster.
Cita Chicago Style (17a ed.)
Gallup, George, y George O'Connell. Who Do Americans Say That L Am ? Philadelphia: Westminster, 1986.
Cita MLA (9a ed.)
Gallup, George, y George O'Connell. Who Do Americans Say That L Am ? Westminster, 1986.
Precaución: Estas citas no son 100% exactas.