APA (7th ed.) Citation

Forsyth, F. (1990). The fourth protocol. Corgi Books.

Chicago Style (17th ed.) Citation

Forsyth, Frederick. The Fourth Protocol. London: Corgi Books, 1990.

MLA (9th ed.) Citation

Forsyth, Frederick. The Fourth Protocol. Corgi Books, 1990.

Warning: These citations may not always be 100% accurate.