Laughton, C. A. (1967). Annotated bibliography and index of the geology of Botswana to 1966. Govt. Printer.
芝加哥风格引文Laughton, C. A. Annotated Bibliography and Index of the Geology of Botswana to 1966. [Gaberones: Govt. Printer, 1967.
MLA引文Laughton, C. A. Annotated Bibliography and Index of the Geology of Botswana to 1966. Govt. Printer, 1967.
警告：这些引文格式不一定是100％准确.