How do you say telephone book in Spanish?
The sentence I need to translate is "Necesito la ____________ telefonica." I know it is supposed to be I need a telephone book but I don't know what word goes in the blank.
In Mexico, it's Directorio telefónico.
However since this is an apparent homework task that you really should be doing on your own, you better use guía as Montenegro has suggested.
From translation on SD....
- Directory. (m) Directorio de teléfonos -> telephone directory
Another option for you.