APA (7th ed.) Citation

Root, H. P. (1972). Should Product Differentiation Be Restricted? Journal of Marketing, 36(3), 3. https://doi.org/10.2307/1251033

Chicago Style (17th ed.) Citation

Root, H. Paul. "Should Product Differentiation Be Restricted?" Journal of Marketing 36, no. 3 (1972): 3. https://doi.org/10.2307/1251033.

MLA (9th ed.) Citation

Root, H. Paul. "Should Product Differentiation Be Restricted?" Journal of Marketing, vol. 36, no. 3, 1972, p. 3, https://doi.org/10.2307/1251033.