Citazione APA

Langdon, D. (2012). Spon's mechanical and electrical services price book 2012 (43rd ed.). Spon Press.

Stile di citazione Chicago

Langdon, Davis. Spon's Mechanical and Electrical Services Price Book 2012. 43rd ed. Abingdon, OX: Spon Press, 2012.

Citazione MLA

Langdon, Davis. Spon's Mechanical and Electrical Services Price Book 2012. 43rd ed. Spon Press, 2012.