Cita APA (7th ed.)

Armstrong, D. (1973). Belief, truth and knowledge. C.U.Pr..

Cita Chicago (17th ed.)

Armstrong, D.M. Belief, Truth and Knowledge. Cambridge: C.U.Pr., 1973.

Cita MLA (9th ed.)

Armstrong, D.M. Belief, Truth and Knowledge. C.U.Pr., 1973.