Armstrong, G. a., & Kotler, P. (2011). Marketing: An introduction. London : Pearson.
Dyfyniad Arddull ChicagoArmstrong, Gary author, and Philip Kotler. Marketing: An Introduction. London : Pearson, 2011.
Dyfyniad MLAArmstrong, Gary author, and Philip Kotler. Marketing: An Introduction. London : Pearson, 2011.
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