WILLIAMS, M. (1994). Interactive Marketing. Prentice-Hal.
Chicago Style aipamenaWILLIAMS, Martin. Interactive Marketing. Prentice-Hal, 1994.
MLA aipamenaWILLIAMS, Martin. Interactive Marketing. Prentice-Hal, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.