Cita APA (7th ed.)

DELENS A H R. (1973). PRINCIPLES OF MARKET RESEARCH. CROSBY LOCKWOOD.

Cita Chicago (17th ed.)

DELENS A H R. PRINCIPLES OF MARKET RESEARCH. LONDON: CROSBY LOCKWOOD, 1973.

Cita MLA (9th ed.)

DELENS A H R. PRINCIPLES OF MARKET RESEARCH. CROSBY LOCKWOOD, 1973.