APA (7th ed.) Citation

Keystone Trails Association & Cramer, B. (2008). Pennsylvania hiking trails (13th ed.). Stackpole Books.

Chicago Style (17th ed.) Citation

Keystone Trails Association and Ben Cramer. Pennsylvania Hiking Trails. 13th ed. Mechanicsburg, Pa.: Stackpole Books, 2008.

MLA (9th ed.) Citation

Keystone Trails Association and Ben Cramer. Pennsylvania Hiking Trails. 13th ed. Stackpole Books, 2008.

Warning: These citations may not always be 100% accurate.