APA Style Citation

Robert A. Heinlein Quotes. (n.d.). BrainyQuote.com. Retrieved May 26, 2019, from BrainyQuote.com Web site: https://www.brainyquote.com/quotes/robert_a_heinlein_390442

Chicago Style Citation

Robert A. Heinlein Quotes. BrainyQuote.com, BrainyMedia Inc, 2019. https://www.brainyquote.com/quotes/robert_a_heinlein_390442, accessed May 26, 2019.

MLA Style Citation

"Robert A. Heinlein Quotes." BrainyQuote.com. BrainyMedia Inc, 2019. 26 May 2019. https://www.brainyquote.com/quotes/robert_a_heinlein_390442