Cita APA (7th ed.)

Gross, B. M., & Springer, M. (1970). Political intelligence for America's future. [s.n.].

Cita Chicago (17th ed.)

Gross, Bertram Myron, i Michael Springer. Political Intelligence for America's Future. Philadelphia: [s.n.], 1970.

Cita MLA (9th ed.)

Gross, Bertram Myron, i Michael Springer. Political Intelligence for America's Future. [s.n.], 1970.