Style de citation APA (7e éd.)

Facchinetti, R., Krug, M. G., & Palmer, F. R. (2003). Modality in contemporary English. Mouton de Gruyter.

Style de citation Chicago (17e éd.)

Facchinetti, Roberta, Manfred G. Krug, et F. R. Palmer. Modality in Contemporary English. Berlin ; New York: Mouton de Gruyter, 2003.

Style de citation MLA (8e éd.)

Facchinetti, Roberta, et al. Modality in Contemporary English. Mouton de Gruyter, 2003.