APA (7th ed.) Citation

Wensley, F. P. (1931). Forty years of Scotland yard; the record of a lifetime's service in the Criminal investigation department. Garden City publishing.

Chicago Style (17th ed.) Citation

Wensley, Frederick Porter. Forty Years of Scotland Yard; the Record of a Lifetime's Service in the Criminal Investigation Department. Garden City, N. Y: Garden City publishing, 1931.

MLA (9th ed.) Citation

Wensley, Frederick Porter. Forty Years of Scotland Yard; the Record of a Lifetime's Service in the Criminal Investigation Department. Garden City publishing, 1931.

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