DNS does all slave Name Server must be in the zone Resource Record file?

Hy guys, I've a problem configuring my Name Server (using bind 9) which is I'ts always necessary to put all slave Name Server for a zone in the zone resource record file or db (as you prefer)?
I've this scenario:
A - my domain which is son of some TLD and I delegated into two new domains B (B.A.org for example) and C (C.A.org), and I've a primary NS for the A domain and for each sub-domain I've there own NS which are slaves of each other. So if I wanted the the sub-domain B to be updated in case of some changes in C zone file, I must declare the B NS in the C zone file as NS for that zone?

I hope I could put my doubt well and hope that someone helps me.
Thanks in advance.

Ideally, yes. Read:

Chapter 8 - NS Record