Cita APA (7a ed.)

BLACK SAM. (1993). PRACTICAL PUBLIC RELATIONS (4.). UNIVERSAL BOOKS.

Cita Chicago Style (17a ed.)

BLACK SAM. PRACTICAL PUBLIC RELATIONS. 4. NEW DELHI: UNIVERSAL BOOKS, 1993.

Cita MLA (9a ed.)

BLACK SAM. PRACTICAL PUBLIC RELATIONS. 4. UNIVERSAL BOOKS, 1993.