Gass, P., & MacGregor, C. L. (1997). The journals of Patrick Gass: Member of the Lewis and Clark Expedition. Mountain Press Pub. Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGass, Patrick, और Carol Lynn MacGregor. The Journals of Patrick Gass: Member of the Lewis and Clark Expedition. Missoula, Mont.: Mountain Press Pub. Co., 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGass, Patrick, और Carol Lynn MacGregor. The Journals of Patrick Gass: Member of the Lewis and Clark Expedition. Mountain Press Pub. Co., 1997.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.