Cita APA (7a ed.)

Spark, D. (1997). A journalist's guide to sources. Focal Press.

Cita Chicago Style (17a ed.)

Spark, David. A Journalist's Guide to Sources. Oxford: Focal Press, 1997.

Cita MLA (9a ed.)

Spark, David. A Journalist's Guide to Sources. Focal Press, 1997.