APA   Click to copy
Bas, M. A., & Orsun, O. F. A Unified Model for Identifying Regime Types and Transitions.

Chicago/Turabian   Click to copy
Bas, Muhammet A., and Omer F. Orsun. “A Unified Model for Identifying Regime Types and Transitions,” n.d.

MLA   Click to copy
Bas, Muhammet A., and Omer F. Orsun. A Unified Model for Identifying Regime Types and Transitions.

@unpublished{bas-a,
  title = {A Unified Model for Identifying Regime Types and Transitions},
  author = {Bas, Muhammet A. and Orsun, Omer F.}
}