Cita APA

Schumacher, E. (1977). A Guide for the perplexed. Sphere books.

Citación estilo Chicago

Schumacher, E.F. A Guide for the Perplexed. London: Sphere books, 1977.

Cita MLA

Schumacher, E.F. A Guide for the Perplexed. Sphere books, 1977.