Cita APA (7th ed.)

Shipler, D. K. (2004). The working poor: Invisible in America. New York: Vintage Books.

Cita Chicago (17th ed.)

Shipler, David K. The Working Poor: Invisible in America. New York: Vintage Books, 2004.

Cita MLA (8th ed.)

Shipler, David K. The Working Poor: Invisible in America. New York: Vintage Books, 2004.