APA (7th ed.) Citation

Franks, N. L. R., Guest, R., & Bailey, F. W. (2018). Black September 1918: WWI's darkest month in the air. Grub Street.

Chicago Style (17th ed.) Citation

Franks, Norman L. R., Russell Guest, and Frank W. Bailey. Black September 1918: WWI's Darkest Month in the Air. London: Grub Street, 2018.

MLA (9th ed.) Citation

Franks, Norman L. R., et al. Black September 1918: WWI's Darkest Month in the Air. Grub Street, 2018.