Παραπομπή σε μορφή APA (7η εκδ.)

Koopman, H. (1984). The syntax of verbs: From verb movement rules in the Kru languages to universal grammar. Foris Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Koopman, Hilda. The Syntax of Verbs: From Verb Movement Rules in the Kru Languages to Universal Grammar. Dordrecht: Foris Publications, 1984.

Παραπομπή σε μορφή MLA (8th εκδ.)

Koopman, Hilda. The Syntax of Verbs: From Verb Movement Rules in the Kru Languages to Universal Grammar. Foris Publications, 1984.