APA (7th ed.) Zitazioa
Søren Hougaard. The Business Idea: The Early Stages of Entrepreneurship. Springer.
Chicago Style (17th ed.) Zitazioa
Søren Hougaard. The Business Idea: The Early Stages of Entrepreneurship. Berlín, Alemania: Springer.
MLA (9th ed.) Zitazioa
Søren Hougaard. The Business Idea: The Early Stages of Entrepreneurship. Springer.
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