APA (7 वां संस्करण) प्रशस्ति पत्र
Castle, H. N., Mead, G. H., & Mead, H. C. (2012). The collected letters of Henry Northrup Castle. Ohio University Press ; Samuel N. and Mary Castle Foundation.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Castle, Henry Northrup, George Herbert Mead, और Helen Castle Mead. The Collected Letters of Henry Northrup Castle. Athens, Ohio : Honolulu, Hawai'i: Ohio University Press ; Samuel N. and Mary Castle Foundation, 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Castle, Henry Northrup, et al. The Collected Letters of Henry Northrup Castle. Ohio University Press ; Samuel N. and Mary Castle Foundation, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.