APA (7 वां संस्करण) प्रशस्ति पत्र
Isert, P. E., & Winsnes, S. A. (2007). Letters on West Africa and the slave trade: Paul Erdmann Isert's journey to Guinea and the Carribean islands in Columbia (1788). Sub-Saharan Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Isert, Paul Erdmann, और Selena Axelrod Winsnes. Letters on West Africa and the Slave Trade: Paul Erdmann Isert's Journey to Guinea and the Carribean Islands in Columbia (1788). Legon, Accra, Ghana: Sub-Saharan Publishers, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Isert, Paul Erdmann, और Selena Axelrod Winsnes. Letters on West Africa and the Slave Trade: Paul Erdmann Isert's Journey to Guinea and the Carribean Islands in Columbia (1788). Sub-Saharan Publishers, 2007.
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