APA (7th ed.) Citation

Roskill, S. W. (1974). Hankey, man of secrets / (by) Stephen Roskill. Collins.

Chicago Style (17th ed.) Citation

Roskill, S. W. Hankey, Man of Secrets / (by) Stephen Roskill. London: Collins, 1974.

MLA (9th ed.) Citation

Roskill, S. W. Hankey, Man of Secrets / (by) Stephen Roskill. Collins, 1974.

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