APA Style
      HAVELUND, K. et al (2015).
    NASA Formal Methods:7th International Symposium, NFM 2015, Pasadena, CA, USA, April 27-29, 2015, Proceedings (1).
    :
  .
  
MLA Style
      HAVELUND, Klaus. et al.
    "NASA Formal Methods:7th International Symposium, NFM 2015, Pasadena, CA, USA, April 27-29, 2015, Proceedings".
    1
    :
  ,
  2015.
  Text.