Schulze, W. (1973). A new geography of Liberia. Longman group.
Chicago Style (17th ed.) CitationSchulze, Willi. A New Geography of Liberia. London: Longman group, 1973.
MLA引文Schulze, Willi. A New Geography of Liberia. Longman group, 1973.
警告:這些引文格式不一定是100%准確.