Cita APA

Eckersley, C. E. 1. (1970). Essential English for foreign students (Rev. ed.). London: Longman.

Citación estilo Chicago

Eckersley, C. E. 1892-1967. Essential English for Foreign Students. Rev. ed. London: Longman, 1970.

Cita MLA

Eckersley, C. E. 1892-1967. Essential English for Foreign Students. Rev. ed. London: Longman, 1970.