Invisible frontier : exploring tunnels, ruins, and rooftops of hidden New York

MLA

Deyo, L.B, and David Leibowitz. Invisible Frontier : Exploring Tunnels, Ruins, and Rooftops of Hidden New York. New York: Three Rivers Press, 2003.

APA

Deyo, L., & Leibowitz, D. (2003). Invisible frontier : exploring tunnels, ruins, and rooftops of hidden New York. New York: Three Rivers Press.

Chicago

Deyo, L.B., and David Leibowitz. Invisible Frontier: Exploring Tunnels, Ruins, and Rooftops of Hidden New York. New York: Three Rivers Press, 2003.