Ferrell, O. C., & Fraedrich, J. F. (2023). Marketing Strategy (8th.). Cengage Learning India Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Ferrell, O C., agus John; Ferrell Fraedrich. Marketing Strategy. 8th. Delhi: Cengage Learning India Pvt. Ltd, 2023.
Lua MLA (9ú heag.)Ferrell, O C., agus John; Ferrell Fraedrich. Marketing Strategy. 8th. Cengage Learning India Pvt. Ltd, 2023.
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