Cita APA (7a ed.)

Eckersley, C. E., Salisbury, C., & Sharrocks, B. (1968). Essential English for foreign students (Rev. ed., new impression.). Longmans, Green.

Cita Chicago Style (17a ed.)

Eckersley, C. E., Charles Salisbury, y Burgess Sharrocks. Essential English for Foreign Students. Rev. ed., new impression. London [etc.]: Longmans, Green, 1968.

Cita MLA (9a ed.)

Eckersley, C. E., et al. Essential English for Foreign Students. Rev. ed., new impression. Longmans, Green, 1968.