Cita APA (7th ed.)

Ceppi, M. (1936). Le casque invisible. D. C. Heath and company.

Cita Chicago (17th ed.)

Ceppi, Marc. Le Casque Invisible. Boston: D. C. Heath and company, 1936.

Cita MLA (9th ed.)

Ceppi, Marc. Le Casque Invisible. D. C. Heath and company, 1936.