APA
Site Investigation Steering Group, . (1993). Guidelines for the safe investigation by drilling of landfills and contaminated land. London: Thomas Telford.
Chicago
Site Investigation Steering Group, . 1993. Guidelines for the safe investigation by drilling of landfills and contaminated land. London: Thomas Telford.
Harvard
Site Investigation Steering Group, . (1993). Guidelines for the safe investigation by drilling of landfills and contaminated land. London: Thomas Telford.
MLA
Site Investigation Steering Group, . Guidelines for the safe investigation by drilling of landfills and contaminated land. London: Thomas Telford. 1993.