Software Engineering Techniques: Report on a Conference Sponsored by the NATO Science Committee, Rome, Italy, 27th to 31st October 1969

Cite it as

@book{buxton1970software,
  title        = {Software Engineering Techniques: Report on a Conference Sponsored by the NATO Science Committee, Rome, Italy, 27th to 31st October 1969},
  author       = {John N. Buxton and Brian Randell},
  year         = {1970},
  publisher    = {Scientific Affairs Division, NATO},
}