(2003). Everything you need, everywhere you need it before you need it: Serving Sanitary Industries.
Chicago-viite (17. p.)Everything You Need, Everywhere You Need It Before You Need It: Serving Sanitary Industries. 2003.
MLA-viite (9. p.)Everything You Need, Everywhere You Need It Before You Need It: Serving Sanitary Industries. 2003.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.