APA (7th ed.) Citation

Dillon, W. R., Madden, T. J., & Firtle, N. H. (1993). Essentials of marketing research. Irwin.

Chicago Style (17th ed.) Citation

Dillon, William R., Thomas J. Madden, and Neil H. Firtle. Essentials of Marketing Research. Homewood, IL ; Boston, MA: Irwin, 1993.

MLA (8th ed.) Citation

Dillon, William R., et al. Essentials of Marketing Research. Irwin, 1993.