Cita APA (7a ed.)

KATZENSTEIN HERBERT. (1992). DIRECT MARKETING (2.). MAXWELL MACMILLAN PUBLICATION LTD.

Cita Chicago Style (17a ed.)

KATZENSTEIN HERBERT. DIRECT MARKETING. 2. NEW YORK: MAXWELL MACMILLAN PUBLICATION LTD, 1992.

Cita MLA (9a ed.)

KATZENSTEIN HERBERT. DIRECT MARKETING. 2. MAXWELL MACMILLAN PUBLICATION LTD, 1992.