Cita APA (7a ed.)

National Council for Mental Hygiene, Provisional National Council for Mental Health (Great Britain), & National Association for Mental Health (Great Britain). (1940). Mental health. National Association for Mental Health.

Cita Chicago Style (17a ed.)

National Council for Mental Hygiene, Provisional National Council for Mental Health (Great Britain), y National Association for Mental Health (Great Britain). Mental Health. London: National Association for Mental Health, 1940.

Cita MLA (9a ed.)

National Council for Mental Hygiene, et al. Mental Health. National Association for Mental Health, 1940.