Lua APA (7ú heag.)

Kotler, P., & Amstrong, G. (2013). Principles of marketing (14th ed.). Pearson educational limited.

Lua i Stíl Chicago (17ú heag.)

Kotler, Philip, agus Gary Amstrong. Principles of Marketing. 14th ed. England: Pearson educational limited, 2013.

Lua MLA (9ú heag.)

Kotler, Philip, agus Gary Amstrong. Principles of Marketing. 14th ed. Pearson educational limited, 2013.

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