APA

Pakkala P. A., Jong M. d. & Äijö J. (2007). International overview of innovative contracting practices for roads. Helsingfors: Finnish Road Administration.

Chicago

Pakkala Pekka A, Jong Martin de and Äijö Juha. 2007. International overview of innovative contracting practices for roads. Helsingfors: Finnish Road Administration.

Harvard

Pakkala P. A., Jong M. d. and Äijö J. (2007). International overview of innovative contracting practices for roads. Helsingfors: Finnish Road Administration.

MLA

Pakkala Pekka A, Jong Martin de and Äijö Juha. International overview of innovative contracting practices for roads. Helsingfors: Finnish Road Administration. 2007.