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That question is settled law.

http://scholar.google.com/scholar_case?case=11598860258825518787&hl=en&as_sdt=2&as_vis=1&oi=scholarr

408 U.S. 665 (1972)
BRANZBURG
v.
HAYES ET AL., JUDGES.

*703 We are unwilling to embark the judiciary on a long and difficult journey to such an uncertain destination. The administration of a constitutional newsman’s privilege would present practical and conceptual difficulties of a high order. Sooner or later, it would be necessary to define those categories of newsmen who qualified for the privilege, a questionable procedure in light of the traditional doctrine that liberty of the press is the right of the lonely pamphleteer who uses carbon paper or a mimeograph just as much as of the large metropolitan publisher who utilizes the latest photocomposition methods.

Cf. In re Grand Jury Witnesses, 322 F. Supp. 573, 574 (ND Cal. 1970). Freedom of the press is a “fundamental personal right” which “is not confined to newspapers and periodicals. It necessarily embraces pamphlets and leaflets. . . . The press in its historic connotation comprehends every sort of publication which affords a vehicle of information and opinion.” Lovell v. Griffin, 303 U. S. 444, 450, 452 (1938). See also Mills 705*705 v. Alabama, 384 U. S. 214, 219 (1966); Murdock v. Pennsylvania, 319 U. S. 105, 111 (1943). The informative function asserted by representatives of the organized press in the present cases is also performed by lecturers, political pollsters, novelists, academic researchers, and dramatists. Almost any author may quite accurately assert that he is contributing to the flow of information to the public, that he relies on confidential sources of information, and that these sources will be silenced if he is forced to make disclosures before a grand jury.[40]