APA (7th ed.) Citation

Calkins, H. W., & Tomlinson, R. F. (1977). Geographic information systems, methods and equipment for land use planning. US Geological Survey [u.a.].

Chicago Style (17th ed.) Citation

Calkins, Hugh W., and R. F. Tomlinson. Geographic Information Systems, Methods and Equipment for Land Use Planning. Reston, Va: US Geological Survey [u.a.], 1977.

MLA (9th ed.) Citation

Calkins, Hugh W., and R. F. Tomlinson. Geographic Information Systems, Methods and Equipment for Land Use Planning. US Geological Survey [u.a.], 1977.