Cita APA (7a ed.)

Gill, R. R. (1990). Deducibility and decidability. Routledge.

Cita Chicago Style (17a ed.)

Gill, R.R. Rockingham. Deducibility and Decidability. London [etc.]: Routledge, 1990.

Cita MLA (9a ed.)

Gill, R.R. Rockingham. Deducibility and Decidability. Routledge, 1990.