APA (7th ed.) Citation

Eckersley, C. E., Salisbury, C., & Sharrocks, B. (1955). Essential English for foreign students. Longmans.

Chicago Style (17th ed.) Citation

Eckersley, C. E., Charles Salisbury, and Burgess Sharrocks. Essential English for Foreign Students. London: Longmans, 1955.

MLA (9th ed.) Citation

Eckersley, C. E., et al. Essential English for Foreign Students. Longmans, 1955.