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progress
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MLA Style Citation
"A quote by Don Marquis" theysaidso.com, 2024. Apr 26, 2024. https://theysaidso.com/quote/don-marquis-the-chief-obstacle-to-the-progress-of-the-human-race-is-the-human-ra
APA Style Citation
"A quote by Don Marquis" (n.d.). theysaidso.com. Retrieved Apr 26, 2024, from theysaidso.com web site : https://theysaidso.com/quote/don-marquis-the-chief-obstacle-to-the-progress-of-the-human-race-is-the-human-ra
Chicago Style Citation
"A quote by Don Marquis". theysaidso.com, 2024. https://theysaidso.com/quote/don-marquis-the-chief-obstacle-to-the-progress-of-the-human-race-is-the-human-ra , accessed Apr 26, 2024.