Graves, R., & Campbell, A. (1968). Creating customers. George Allen & Unwin.
Chicago Style aipamenaGraves, Richard, and Allan Campbell. Creating Customers. London: George Allen & Unwin, 1968.
MLA aipamenaGraves, Richard, and Allan Campbell. Creating Customers. George Allen & Unwin, 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.