Cita APA

Look, & Look. (1955). Look at the U.S.A. Boston: Houghton Mifflin.

Citación estilo Chicago

Look, y Look. Look At the U.S.A. Boston: Houghton Mifflin, 1955.

Cita MLA

Look, y Look. Look At the U.S.A. Boston: Houghton Mifflin, 1955.