Reference: Hale et al. 1977

Hale, Kenneth, Ellavina Tsosie-Perkins, Richard Demers & Dorothy Shank. 1977. The Structure of Navajo (Course Notes). University of Arizona manuscript.

@misc{hale1977navajo,
  author    = {Hale, Kenneth and Tsosie-Perkins, Ellavina and Demers, Richard and Shank, Dorothy},
  publisher = {University of Arizona manuscript},
  title     = {The Structure of Navajo (Course Notes)},
  year      = {1977}
}