APA (7th ed.) Citation

Engel, J. F., Wales, H. G., & Warshaw, M. R. (1967). Promotional strategy. R. D. Irwin.

Chicago Style (17th ed.) Citation

Engel, James F., Hugh G. Wales, and Martin R. Warshaw. Promotional Strategy. Homewood, Ill.: R. D. Irwin, 1967.

MLA (9th ed.) Citation

Engel, James F., et al. Promotional Strategy. R. D. Irwin, 1967.