APA (7th ed.) Citation

Wagner, N. J. (1999). Picking a medium for your message. Nation's Business, 87(2), 56.

Chicago Style (17th ed.) Citation

Wagner, Nancy J. "Picking a Medium for Your Message." Nation's Business 87, no. 2 (1999): 56.

MLA (9th ed.) Citation

Wagner, Nancy J. "Picking a Medium for Your Message." Nation's Business, vol. 87, no. 2, 1999, p. 56.