(1900). The science of numbers simplified: A book of practical short rules in mathematics. New York: J. L. O'Connor.
शिकागो स्टाइल उद्धरणThe Science of Numbers Simplified: A Book of Practical Short Rules in Mathematics. New York: J. L. O'Connor, 1900.
एमएलए उद्धरणThe Science of Numbers Simplified: A Book of Practical Short Rules in Mathematics. New York: J. L. O'Connor, 1900.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.