Cita APA (7a ed.)

(1948). Ifo-Schnelldienst. Ifo-Institut.

Cita Chicago Style (17a ed.)

Ifo-Schnelldienst. München: Ifo-Institut, 1948.

Cita MLA (8a ed.)

Ifo-Schnelldienst. Ifo-Institut, 1948.