Clark, C., & Haswell, M. j. a. (1964). The economics of subsistence agriculture, by Colin Clark and Margaret Haswell. MacMilan.
Chicago Style (17th ed.) CitationClark, Colin, and Margaret joint author Haswell. The Economics of Subsistence Agriculture, by Colin Clark and Margaret Haswell. London: MacMilan, 1964.
MLA (9th ed.) CitationClark, Colin, and Margaret joint author Haswell. The Economics of Subsistence Agriculture, by Colin Clark and Margaret Haswell. MacMilan, 1964.
Warning: These citations may not always be 100% accurate.