MLA

Petter, Marga. Getting Pro Under Control : a Syntactic Analysis of the Nature and Distribution of Unexpressed Subjects In Non-finite and Verbless Clauses. The Hague: Holland academic graphics, 1998.

APA

Petter, M. (1998). Getting PRO under control : a syntactic analysis of the nature and distribution of unexpressed subjects in non-finite and verbless clauses. The Hague: Holland academic graphics.

Chicago

Petter, Marga Getting PRO Under Control: A Syntactic Analysis of the Nature and Distribution of Unexpressed Subjects In Non-Finite and Verbless Clauses. The Hague: Holland academic graphics, 1998.