APA (7th ed.) Citation

Eckersley, C. E. (1942). Essential English (2a. ed.). Longmans Green.

Chicago Style (17th ed.) Citation

Eckersley, C. E. Essential English. 2a. ed. Londres: Longmans Green, 1942.

MLA (9th ed.) Citation

Eckersley, C. E. Essential English. 2a. ed. Longmans Green, 1942.