Snallygaster (English Wikipedia)

Cannon, Timothy L.; Whitmore, Nancy F. (1979). Ghosts and Legends of Frederick County. Cannon. ISBN 9780960281602. Retrieved 2 February 2018.
Okonowicz, Ed (2012). Monsters of Maryland: Mysterious Creatures in the Old Line State. Stackpole Books. pp. 7–30 (snallygaster chapter, slaves), 11 (descriptions), 12 (Schneller Geist), 17 (seven-pointed star), 26 (Schneller Geist). ISBN 9780811734097. Retrieved 2 February 2018.
Boyton, Patrick (2011). Snallygaster: The Lost Legend of Frederick County. Lulu.com Publishing. p. 63 (wrongly cites "Haunted"; should cite "Monsters"). ISBN 9780615250427. Retrieved 2 February 2018.
Williams, Thomas John Chew (1910). History of Frederick County, Maryland: From the Earliest Settlements to the Beginning of the War Between the States, Volume 1. Higginson Book Company. pp. 1, 8, 111, 406–408, 420, 477, 500. Retrieved 2 February 2018.
Hooper, Anne B. (1974). Braddock Heights: A Glance Backward. Great Southern Printing Co. pp. 71–72. Retrieved 2 February 2018..
Blank, Trevor J.; Puglia, David J. (2014). Maryland Legends: Folklore from the Old Line State (Illustrated ed.). Arcadia Publishing. ISBN 978-1625849519. Retrieved 15 March 2018.
Chambers, Whittaker (22 June 1953). "Is Academic Freedom in Danger?". Life. Time, Inc. p. 91. Retrieved 2 February 2018.

dragondistillery.com

"Frederick author resurrects legend of local monster". Frederick News Post. 20 October 2011. Retrieved 2 February 2018.

"Snallygaster 2017 FAQs" (PDF). ReverbNation. Retrieved 2 February 2018.^{[permanent dead link]}