Παραπομπή APA

(1995). Guide to best practice for the installation of pipe jacks and microtunnels. London: Pipe Jacking Association.

Παραπομπή Chicago Style

Guide to Best Practice for the Installation of Pipe Jacks and Microtunnels. London: Pipe Jacking Association, 1995.

Παραπομπή MLA

Guide to Best Practice for the Installation of Pipe Jacks and Microtunnels. London: Pipe Jacking Association, 1995.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.