Citace podle APA (7th ed.)
OPARA, V. U. (1911). The Institution of Family in Nigeria: With particular reference to Igboland. Pontificia Università Lateranense (PUL).
Citace podle Chicago (17th ed.)
OPARA, Vincentia Uchechi. The Institution of Family in Nigeria: With Particular Reference to Igboland. Roma: Pontificia Università Lateranense (PUL), 1911.
Citace podle MLA (9th ed.)
OPARA, Vincentia Uchechi. The Institution of Family in Nigeria: With Particular Reference to Igboland. Pontificia Università Lateranense (PUL), 1911.
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