Παραπομπή σε μορφή APA (7η εκδ.)

Petter, M. (1998). Getting PRO under control: A syntactic analysis of the nature and distribution of unexpressed subjects in non-finite and verbless clauses. LOT.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Petter, Marga. Getting PRO Under Control: A Syntactic Analysis of the Nature and Distribution of Unexpressed Subjects in Non-finite and Verbless Clauses. Utrecht: LOT, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Petter, Marga. Getting PRO Under Control: A Syntactic Analysis of the Nature and Distribution of Unexpressed Subjects in Non-finite and Verbless Clauses. LOT, 1998.