APA (7th ed.) Citation

(2004). Reader's digest: Power up your english. Reader's Digest Association Far East Limited.

Chicago Style (17th ed.) Citation

Reader's Digest: Power Up Your English. Hong Kong: Reader's Digest Association Far East Limited, 2004.

MLA (8th ed.) Citation

Reader's Digest: Power Up Your English. Reader's Digest Association Far East Limited, 2004.