AdAge: Adver­tis­ing Age mag­a­zine; news, analy­sis, infor­ma­tion, and data on adver­tis­ing, mar­ket­ing and media; site includes news, demo­graph­ics, columns, blogs, pod­casts, and white papers

AMA: Amer­i­can Mar­ket­ing Asso­ci­a­tion; pro­fes­sional asso­ci­a­tions for mar­keters; infor­ma­tion, knowl­edge shar­ing and devel­op­ment in the mar­ket­ing pro­fes­sion; Web site includes best prac­tices, case stud­ies, web­casts, arti­cles and reports, and a dic­tio­nary of mar­ket­ing terms