APA (7th ed.) Citation

Hornby,A.S. (1970). Oxford Progressive English Course / A.S.Hornby. Oxford.

Chicago Style (17th ed.) Citation

Hornby,A.S. Oxford Progressive English Course / A.S.Hornby. Oxford, 1970.

MLA (8th ed.) Citation

Hornby,A.S. Oxford Progressive English Course / A.S.Hornby. Oxford, 1970.

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