Gaya APA

JOHNSTON, M, W., MARSHALL, G, W. (2009). Churchill/ford/walker's sales force management (9th ed.). Boston: McGraw-Hill Irwin.

Gaya MLA

JOHNSTON, Mark, W.., MARSHALL, Greg, W.. "Churchill/ford/walker's sales force management". 9th ed. Boston: McGraw-Hill Irwin, 2009. Buku.