Schulze, W. (1973). A new geography of Liberia. Longman group.
Chicago-čujuhus (17. p.)Schulze, Willi. A New Geography of Liberia. London: Longman group, 1973.
MLA-čujuhus (9. p.)Schulze, Willi. A New Geography of Liberia. Longman group, 1973.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.