एपीए उद्धरण

Williams, R. L., & Williams, H. A. (2020). Vintage Marketing Differentiation. 1st ed. 2017. Palgrave Macmillan US.

शिकागो स्टाइल उद्धरण

Williams, Robert L., और Helena A. Williams. Vintage Marketing Differentiation. 1st Ed. 2017. Palgrave Macmillan US, 2020.

एमएलए उद्धरण

Williams, Robert L., और Helena A. Williams. Vintage Marketing Differentiation. 1st Ed. 2017. Palgrave Macmillan US, 2020.