Bybee, Joan L. and Perkins, Revere and Pagliuca, William. 1994. The evolution of grammar: Tense, aspect, and modality in the languages of the world. Chicago: University of Chicago Press.
@book{195, address = {Chicago}, author = {Bybee, Joan L. and Perkins, Revere and Pagliuca, William}, booktitle = {The evolution of grammar: Tense, aspect, and modality in the languages of the world}, key = {Bybee et al. 1994}, publisher = {University of Chicago Press}, title = {The evolution of grammar: Tense, aspect, and modality in the languages of the world}, type = {Bibliographical record}, url = {https://books.google.de/books?id=aOvU6m-f1IwC}, year = {1994} }