APA (7th ed.) Citation

Eckersley, C. E. (1950). A modern english course for foreign students an intermediate book. Longmans Green.

Chicago Style (17th ed.) Citation

Eckersley, C. E. A Modern English Course for Foreign Students an Intermediate Book. Londres: Longmans Green, 1950.

MLA (9th ed.) Citation

Eckersley, C. E. A Modern English Course for Foreign Students an Intermediate Book. Longmans Green, 1950.