APA (7 वां संस्करण) प्रशस्ति पत्र
Buel, J. W. (1889). Heroes of the Dark Continent: A complete history of all the great explorations and discoveries in Africa, from the earliest ages to the present time. North American Publishing Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Buel, James W. Heroes of the Dark Continent: A Complete History of All the Great Explorations and Discoveries in Africa, from the Earliest Ages to the Present Time. St. Louis: North American Publishing Co., 1889.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Buel, James W. Heroes of the Dark Continent: A Complete History of All the Great Explorations and Discoveries in Africa, from the Earliest Ages to the Present Time. North American Publishing Co., 1889.
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