Perkins 1983

Perkins, Michael R. 1983. Modal Expressions in English. (Open Linguistics Series.) London: Pinter.

@book{Perkins-1983,
  address   = {London},
  author    = {Perkins, Michael R.},
  publisher = {Pinter},
  series    = {Open Linguistics Series},
  title     = {Modal Expressions in English},
  year      = {1983}
}