Spalding. Contesting Trade in Central America. University of Texas Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpalding. Contesting Trade in Central America. University of Texas Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSpalding. Contesting Trade in Central America. University of Texas Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.