APA (7th ed.) Citation

Harker, I. (2014). Improve your skills listening & speaking for IELTS 4.5-6.0 CD1 Units 1-5. MacMilan Publ. Limited.

Chicago Style (17th ed.) Citation

Harker, Ian. Improve Your Skills Listening & Speaking for IELTS 4.5-6.0 CD1 Units 1-5. MacMilan Publ. Limited, 2014.

MLA (8th ed.) Citation

Harker, Ian. Improve Your Skills Listening & Speaking for IELTS 4.5-6.0 CD1 Units 1-5. MacMilan Publ. Limited, 2014.

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