Conrad, A. H. (1978). Wilderness preservation, planning, and management: An annotated bibliography. Council of Planning Librarians.
Lua i Stíl Chicago (17ú heag.)Conrad, Adam Halicki. Wilderness Preservation, Planning, and Management: An Annotated Bibliography. Monticello, Ill.: Council of Planning Librarians, 1978.
Lua MLA (8ú heag.)Conrad, Adam Halicki. Wilderness Preservation, Planning, and Management: An Annotated Bibliography. Council of Planning Librarians, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.