Cita APA (7a ed.)

Betts, E. A., & Greene, H. A. (1958). Daily drills in language skills. Row, Peterson and Co..

Cita Chicago Style (17a ed.)

Betts, Emmett A., y Harry A. Greene. Daily Drills in Language Skills. Evanston, Ill. : Elmsford, N.Y.: Row, Peterson and Co., 1958.

Cita MLA (8a ed.)

Betts, Emmett A., y Harry A. Greene. Daily Drills in Language Skills. Row, Peterson and Co., 1958.