APA
American Petroleum Institute A., . (1991). An evaluation of soil gas and geophysical techniques for detection of hydrocarbons. Washington: American Petroleum Institute, API.
Chicago
American Petroleum Institute API, . 1991. An evaluation of soil gas and geophysical techniques for detection of hydrocarbons. Washington: American Petroleum Institute, API.
Harvard
American Petroleum Institute A., . (1991). An evaluation of soil gas and geophysical techniques for detection of hydrocarbons. Washington: American Petroleum Institute, API.
MLA
American Petroleum Institute API, . An evaluation of soil gas and geophysical techniques for detection of hydrocarbons. Washington: American Petroleum Institute, API. 1991.