APA
United Kingdom, . (1996). Planning policy guidance : development on unstable land : landslides and planning. London: HMSO.
Chicago
United Kingdom, . 1996. Planning policy guidance : development on unstable land : landslides and planning. London: HMSO.
Harvard
United Kingdom, . (1996). Planning policy guidance : development on unstable land : landslides and planning. London: HMSO.
MLA
United Kingdom, . Planning policy guidance : development on unstable land : landslides and planning. London: HMSO. 1996.