DuBois and DuBois 1991 [1986]

DuBois, Lauretta J. and DuBois, Carl D. 1991 [1986]. Tagabawa Grammar Essentials. Manila: Linguistic Society of the Philippines and Summer Institute of Linguistics. 41pp.

@book{sDuboisDuboisTagabawa,
  author    = {DuBois, Lauretta J. and DuBois, Carl D.},
  pages     = {41},
  publisher = {Manila: Linguistic Society of the Philippines and Summer Institute of Linguistics},
  title     = {Tagabawa Grammar Essentials},
  year      = {1991 [1986]}
}