Cita APA (7a ed.)

Heaney, S. (1996). The spirit level (1st pub.). Faber and Faber.

Cita Chicago Style (17a ed.)

Heaney, Seamus. The Spirit Level. 1st pub. London [etc.]: Faber and Faber, 1996.

Cita MLA (9a ed.)

Heaney, Seamus. The Spirit Level. 1st pub. Faber and Faber, 1996.