Cita APA (7a ed.)

PLACKARD, D. H. Blueprint for public relations. McGraw-Hill Book Company.

Cita Chicago Style (17a ed.)

PLACKARD, Dwight Hillis. Blueprint for Public Relations. McGraw-Hill Book Company.

Cita MLA (8a ed.)

PLACKARD, Dwight Hillis. Blueprint for Public Relations. McGraw-Hill Book Company.