APA (7th ed.) Citation
Delens A. H. R. (1950). Principles of market research (ed.). Crosby Lockwood & Sons.
Chicago Style (17th ed.) Citation
Delens A. H. R. Principles of Market Research. ed. London: Crosby Lockwood & Sons, 1950.
MLA (9th ed.) Citation
Delens A. H. R. Principles of Market Research. ed. Crosby Lockwood & Sons, 1950.
Warning: These citations may not always be 100% accurate.