APA (7th ed.) Citation

Ballard, P. B. (1939). Teaching and testing Englsih / by P.B. Ballard. U. of London P.

Chicago Style (17th ed.) Citation

Ballard, P. B. Teaching and Testing Englsih / by P.B. Ballard. U. of London P, 1939.

MLA (9th ed.) Citation

Ballard, P. B. Teaching and Testing Englsih / by P.B. Ballard. U. of London P, 1939.

Warning: These citations may not always be 100% accurate.