APA Style Citation

Concentration Quotes. (n.d.). BrainyQuote.com. Retrieved December 9, 2019, from BrainyQuote.com Web site: https://www.brainyquote.com/topics/concentration-quotes

Chicago Style Citation

Concentration Quotes. BrainyQuote.com, BrainyMedia Inc, 2019. https://www.brainyquote.com/topics/concentration-quotes, accessed December 9, 2019.

MLA Style Citation

"Concentration Quotes." BrainyQuote.com. BrainyMedia Inc, 2019. 9 December 2019. https://www.brainyquote.com/topics/concentration-quotes