APA (7 वां संस्करण) प्रशस्ति पत्र
Johnson, R. (1970). African perpectives: Papers in the history, politics and ecnomomicc of Africa presented to Thomas hodgkin. Cambridge University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Johnson, R.W. African Perpectives: Papers in the History, Politics and Ecnomomicc of Africa Presented to Thomas Hodgkin. Cambridge: Cambridge University, 1970.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Johnson, R.W. African Perpectives: Papers in the History, Politics and Ecnomomicc of Africa Presented to Thomas Hodgkin. Cambridge University, 1970.
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