Cita APA (7a ed.)

Schreier, P. A. (1971). The United States: Understanding through inquiry. Guinness.

Cita Chicago Style (17a ed.)

Schreier, Phillip A. The United States: Understanding Through Inquiry. New York [u.a.]: Guinness, 1971.

Cita MLA (9a ed.)

Schreier, Phillip A. The United States: Understanding Through Inquiry. Guinness, 1971.