APA (7th ed.) Citation

Hartley, S. E., Flaschner, A. B., & Prough, G. E. (1983). Essentials of marketing research. PennWell Books.

Chicago Style (17th ed.) Citation

Hartley, Sue E., Alan B. Flaschner, and George E. Prough. Essentials of Marketing Research. Tulsa, Okla.: PennWell Books, 1983.

MLA (9th ed.) Citation

Hartley, Sue E., et al. Essentials of Marketing Research. PennWell Books, 1983.