Lewis, E. (1968). Marketing Channels: Structure and strategy. McGraw Hill.
Chicago Style aipamenaLewis, E. Marketing Channels: Structure and Strategy. New York: McGraw Hill, 1968.
MLA aipamenaLewis, E. Marketing Channels: Structure and Strategy. McGraw Hill, 1968.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.