Howland, H. J. (1972). Theodore Roosevelt and his times: A chronicle of the progressive movement. Glasgow, Brook.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHowland, Harold Jacobs. Theodore Roosevelt and His Times: A Chronicle of the Progressive Movement. Toronto: Glasgow, Brook, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHowland, Harold Jacobs. Theodore Roosevelt and His Times: A Chronicle of the Progressive Movement. Glasgow, Brook, 1972.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.