APA (7th ed.) Zitazioa
Kett, A. (1998). Passport Singapore: Your pocket guide to Singaporean business, customs & etiquette. World Trade Press.
Chicago Style (17th ed.) Zitazioa
Kett, Alexandra. Passport Singapore: Your Pocket Guide to Singaporean Business, Customs & Etiquette. San Rafael, CA: World Trade Press, 1998.
MLA (9th ed.) Zitazioa
Kett, Alexandra. Passport Singapore: Your Pocket Guide to Singaporean Business, Customs & Etiquette. World Trade Press, 1998.
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