Lewis, P. W. Unser Vortex 1914: Percy Windham Lewis. 1895 - 1941.(1998).
Cita Chicago (17th ed.)Lewis, Percy Windham. "Unser Vortex 1914: Percy Windham Lewis." 1895 - 1941.(1998) .
Cita MLA (8th ed.)Lewis, Percy Windham. "Unser Vortex 1914: Percy Windham Lewis." 1895 - 1941.(1998), .
Atenció: Aquestes cites poden no estar 100% correctes.