No. There are innumerable ways to weave a quotation gracefully into your prose. As long as the quotation’s purpose and source are clear, you need not use a verb like writes or has said.

The paired examples below illustrate alternative ways of identifying authors:

Author’s Name in Text

It may be true, as Sharon Lubkemann Allen maintains, that “in modernist works charting their own becoming in the context of urban crisis, the multiplicity of the self is concomitantly represented in urban space” (15).

Author’s Name in Reference

It may be true that “in modernist works charting their own becoming in the context of urban crisis, the multiplicity of the self is concomitantly represented in urban space” (Allen 15).

Author’s Name in Text

Deborah Tannen has argued this point (178-85).

Author’s Name in Reference

This point has already been argued (Tannen 178-85).