APA (7th ed.) Citation

Northern Nigeria (Protectorate). Blue book. Printed by the Govt. Printer.

Chicago Style (17th ed.) Citation

Northern Nigeria (Protectorate). Blue Book. Lagos: Printed by the Govt. Printer.

MLA (8th ed.) Citation

Northern Nigeria (Protectorate). Blue Book. Printed by the Govt. Printer.

Warning: These citations may not always be 100% accurate.