APA (7th ed.) Citation

Sage Publications. (1974). Sage readers in 20th [twentieth] century history. Sage Publ.

Chicago Style (17th ed.) Citation

Sage Publications. Sage Readers in 20th [twentieth] Century History. London [u.a.]: Sage Publ, 1974.

MLA (9th ed.) Citation

Sage Publications. Sage Readers in 20th [twentieth] Century History. Sage Publ, 1974.

Warning: These citations may not always be 100% accurate.