APA (7th ed.) Zitazioa
Diettrich, S. d. R. Around the World Program: The Philippine Islands. Doubleday.
Chicago Style (17th ed.) Zitazioa
Diettrich, Sigismond de R. Around the World Program: The Philippine Islands. Nueva York, EUA: Doubleday.
MLA (9th ed.) Zitazioa
Diettrich, Sigismond de R. Around the World Program: The Philippine Islands. Doubleday.
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