executing package DTExec

I created a package and stored in SQL server.

I am running it as follows

master.dbo.xp_cmdshell dtexec /sq "ABC DEF GHI" /ser "Prod"

ABC DEF GHI --> is my package name.

When i run this from a job, it runs without error

but when i run the above sql i am getting error as

Msg 102, Level 15, State 1, Line 2

Incorrect syntax near '/'.

Am i missing some thing, please advice. Is that the problem between spaces in the package name?

I missed the single quotes

master.dbo.xp_cmdshell 'dtexec /sq "ABC DEF GHI" /ser "Prod"'