APA (7th ed.) Citation

Reader's Digest. (1979). How to increase your word power. Reader's Digest Association.

Chicago Style (17th ed.) Citation

Reader's Digest. How to Increase Your Word Power. Hong Kong: Reader's Digest Association, 1979.

MLA (9th ed.) Citation

Reader's Digest. How to Increase Your Word Power. Reader's Digest Association, 1979.

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