APA (7th ed.) Citation

(1991). Problems in the modality of natural language. Pedag. Univ.

Chicago Style (17th ed.) Citation

Problems in the Modality of Natural Language. Opole: Pedag. Univ, 1991.

MLA (9th ed.) Citation

Problems in the Modality of Natural Language. Pedag. Univ, 1991.

Warning: These citations may not always be 100% accurate.