Citazione APA

National Center for Construction Education and Research. (2001). Plumbing: Level two. Prentice Hall.

Stile di citazione Chicago

National Center for Construction Education and Research. Plumbing: Level Two. Upper Saddle River, NJ: Prentice Hall, 2001.

Citazione MLA

National Center for Construction Education and Research. Plumbing: Level Two. Prentice Hall, 2001.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.