APA (7th ed.) Citation

(1956). Bradford's directory of marketing research agencies in the United States and the world. Bradford's Directory of Marketing Research Agencies.

Chicago Style (17th ed.) Citation

Bradford's Directory of Marketing Research Agencies in the United States and the World. New Rochelle, N.Y.: Bradford's Directory of Marketing Research Agencies, 1956.

MLA (9th ed.) Citation

Bradford's Directory of Marketing Research Agencies in the United States and the World. Bradford's Directory of Marketing Research Agencies, 1956.