APA (7th ed.) Zitazioa
Engel, D. W., & Peterson, L. (2001). Passport USA: Your pocket guide to American business, culture & etiquette. World Trade Press.
Chicago Style (17th ed.) Zitazioa
Engel, Dean W., eta Larry Peterson. Passport USA: Your Pocket Guide to American Business, Culture & Etiquette. San Rafael, Calif.: World Trade Press, 2001.
MLA (9th ed.) Zitazioa
Engel, Dean W., eta Larry Peterson. Passport USA: Your Pocket Guide to American Business, Culture & Etiquette. World Trade Press, 2001.
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