APA-viite (7. p.)

Restan, P. (1972). Syntax of the interrogative sentence: Yes-no questions (mainly on the basis of Russian material). Universitetsforlaget.

Chicago-viite (17. p.)

Restan, Per. Syntax of the Interrogative Sentence: Yes-no Questions (mainly on the Basis of Russian Material). Oslo: Universitetsforlaget, 1972.

MLA-viite (8. p.)

Restan, Per. Syntax of the Interrogative Sentence: Yes-no Questions (mainly on the Basis of Russian Material). Universitetsforlaget, 1972.