Cita APA (7th ed.)

Schumacher, E. (1977). A guide for the perplexed. Jonathan Cape.

Cita Chicago (17th ed.)

Schumacher, E. A Guide for the Perplexed. London: Jonathan Cape, 1977.

Cita MLA (9th ed.)

Schumacher, E. A Guide for the Perplexed. Jonathan Cape, 1977.