@misc{gray1994,
  author       = {Gray, David},
  howpublished = {Cheltenham: SIL-NEG. Online: url{http://infoabad.com/upload/forum/post19757/graydavidashortdescriptivegrammarofturkmenlanguage\_0d4fe.pdf}},
  title        = {A short descriptive grammar of the Turkmen language},
  year         = {1994}
}