PARR, A. (2003). Hydraulics and pneumatics a technician's and engineer's guide (Ed.2.). Elsevier Butterworth-Heinemann.
Dyfyniad Arddull ChicagoPARR, Andrew. Hydraulics and Pneumatics a Technician's and Engineer's Guide. Ed.2. Amsterdam: Elsevier Butterworth-Heinemann, 2003.
Dyfyniad MLAPARR, Andrew. Hydraulics and Pneumatics a Technician's and Engineer's Guide. Ed.2. Elsevier Butterworth-Heinemann, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.