Cita APA (7a ed.)

Quine, W. V. O. (1960). Necessary truth. U.S. Information Agency.

Cita Chicago Style (17a ed.)

Quine, Willard Van Orman. Necessary Truth. Washington: U.S. Information Agency, 1960.

Cita MLA (9a ed.)

Quine, Willard Van Orman. Necessary Truth. U.S. Information Agency, 1960.