Dokumentuaren aipamena

APA (7th ed.) Zitazioa
Billings, J. D. (2001). Hardtack and coffee. Digital Scanning.
Chicago Style (17th ed.) Zitazioa
Billings, John Davis. Hardtack and Coffee. Scituate, Mass.: Digital Scanning, 2001.
MLA (9th ed.) Zitazioa
Billings, John Davis. Hardtack and Coffee. Digital Scanning, 2001.
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