Gaya APA

Johnston, M, W., Marshall, G, W. (2016). Sales force management : leadership, innovation, technology (12th ed.). New York: Routledge.

Gaya MLA

Johnston, Mark, W.., Marshall, Greg, W.. "Sales force management : leadership, innovation, technology". 12th ed. New York: Routledge, 2016. Buku/Printed Material.