Cita APA (7a ed.)

Cook, C., Leonard, J., & Leese, P. (1994). The Longman guide to sources in contemporary British history. Longman.

Cita Chicago Style (17a ed.)

Cook, Chris, Jane Leonard, y Peter Leese. The Longman Guide to Sources in Contemporary British History. London [etc.]: Longman, 1994.

Cita MLA (9a ed.)

Cook, Chris, et al. The Longman Guide to Sources in Contemporary British History. Longman, 1994.