Gaya APA

P.E, E, R, S., P.E, T, M, M. (2014). PIPELINE DESIGN FOR INSTALLASION BY HORIZONTAL DIRECTIONAL DRILLING . america: ASCE.

Gaya MLA

P.E, Eric, R., Skonberg,., P.E, Tennyson, M., Muindi,. "PIPELINE DESIGN FOR INSTALLASION BY HORIZONTAL DIRECTIONAL DRILLING". america: ASCE, 2014. Text.