Henry, S. L., & Gyrisco, G. M. (1993). Protecting archeological sites on private lands. [Washington, D.C.]: U.S. Dept. of the Interior, National Park Service, Preservation Planning Branch, Interagency Resources Division.
Чикагска система за цитиранеHenry, Susan L., и Geoffrey Maitland Gyrisco. Protecting Archeological Sites On Private Lands. [Washington, D.C.]: U.S. Dept. of the Interior, National Park Service, Preservation Planning Branch, Interagency Resources Division, 1993.
MLA формат за цитиранеHenry, Susan L., и Geoffrey Maitland Gyrisco. Protecting Archeological Sites On Private Lands. [Washington, D.C.]: U.S. Dept. of the Interior, National Park Service, Preservation Planning Branch, Interagency Resources Division, 1993.
Внимание: Тези цитати може да не са 100% точни.