Cita APA (7a ed.)

Sterling, E. L., & Cole, M. E. (1927). Important points in English usage: A laboratory method in the essentials of good English ([2nd experimental ed.].). [Press of S & S printers].

Cita Chicago Style (17a ed.)

Sterling, Edna L., y Miriam Elizabeth Cole. Important Points in English Usage: A Laboratory Method in the Essentials of Good English. [2nd experimental ed.]. [Seattle]: [Press of S & S printers], 1927.

Cita MLA (8a ed.)

Sterling, Edna L., y Miriam Elizabeth Cole. Important Points in English Usage: A Laboratory Method in the Essentials of Good English. [2nd experimental ed.]. [Press of S & S printers], 1927.