APA (7 वां संस्करण) प्रशस्ति पत्र
Langa, P. V. (2014). Higher Education in Portuguese Speaking African Countries: Higher Education in Portuguese Speaking African Countries. Project Muse.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Langa, Patrício Vitorino. Higher Education in Portuguese Speaking African Countries: Higher Education in Portuguese Speaking African Countries. Baltimore, Maryland: Project Muse, 2014.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Langa, Patrício Vitorino. Higher Education in Portuguese Speaking African Countries: Higher Education in Portuguese Speaking African Countries. Project Muse, 2014.
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