APA
(2016). Plumbing 201: PHCC Educational Foundation Plumbing Apprentice & Journeyman Training Committee. Boston, USA: Cengage Learning.
Chicago
2016. Plumbing 201: PHCC Educational Foundation Plumbing Apprentice & Journeyman Training Committee. Boston, USA: Cengage Learning.
Harvard
(2016). Plumbing 201: PHCC Educational Foundation Plumbing Apprentice & Journeyman Training Committee. Boston, USA: Cengage Learning.
MLA
Plumbing 201: PHCC Educational Foundation Plumbing Apprentice & Journeyman Training Committee. Boston, USA: Cengage Learning. 2016.