APA (7th ed.) Citation

Barker, A. (2004). Improve Your Communication Skills. elex media komputindo.

Chicago Style (17th ed.) Citation

Barker, Alan. Improve Your Communication Skills. elex media komputindo, 2004.

MLA (8th ed.) Citation

Barker, Alan. Improve Your Communication Skills. elex media komputindo, 2004.

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