Cita APA (7th ed.)

Forsyth, F. (1984). The fourth protocol (1a. ed.). Corgi Books.

Cita Chicago (17th ed.)

Forsyth, Frederick. The Fourth Protocol. 1a. ed. Londres: Corgi Books, 1984.

Cita MLA (9th ed.)

Forsyth, Frederick. The Fourth Protocol. 1a. ed. Corgi Books, 1984.