APA (7th ed.) Citation

Great Britain. Directorate of Overseas Surveys & Sierra Leone. Ministry of Lands, M. a. L. (1967). Sierra Leone 1: 50,000 (2nd ed. - D.O.S.). Directorate of Overseas Surveys for the Sierra Leone Government.

Chicago Style (17th ed.) Citation

Great Britain. Directorate of Overseas Surveys and Mines and Labour Sierra Leone. Ministry of Lands. Sierra Leone 1: 50,000. 2nd ed. - D.O.S. [Tolworth, Surrey]: Directorate of Overseas Surveys for the Sierra Leone Government, 1967.

MLA (8th ed.) Citation

Great Britain. Directorate of Overseas Surveys and Mines and Labour Sierra Leone. Ministry of Lands. Sierra Leone 1: 50,000. 2nd ed. - D.O.S. Directorate of Overseas Surveys for the Sierra Leone Government, 1967.