APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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