APA (7th ed.) Citation

Blackwood, G. (2017). Tom Clancy's duty and honour. Penguin Books.

Chicago Style (17th ed.) Citation

Blackwood, Grant. Tom Clancy's Duty and Honour. New York: Penguin Books, 2017.

MLA (9th ed.) Citation

Blackwood, Grant. Tom Clancy's Duty and Honour. Penguin Books, 2017.

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