Cita APA (7a ed.)

Sage Publications, Beverly Hills, Calif.; London, & Sage Publications. (1974). Sage readers in 20th [twentieth] century history. Sage Publ.

Cita Chicago Style (17a ed.)

Sage Publications, Beverly Hills, Calif.; London, y Sage Publications. Sage Readers in 20th [twentieth] Century History. London [u.a.]: Sage Publ, 1974.

Cita MLA (8a ed.)

Sage Publications, Beverly Hills, Calif.; London, y Sage Publications. Sage Readers in 20th [twentieth] Century History. Sage Publ, 1974.