Sir Oliver Lodge, Raymond Lodge (Spirit) (1916). “Raymond Revised: A New Abbreviated Edition of "Raymond Or Life and Death" with an Additional Chapter”
Carolyn Lanchner, Fernand Léger, Jodi Hauptman, Matthew Affron (1998). “Fernand Léger: [Exposición] The Museum of Modern Art, New York, February 15-May 12, 1998”, p.124, The Museum of Modern Art