APA (7th ed.) Citation

Clark, C., & Haswell, M. R. The economics of subsistence agriculture [by] Colin Clark and Margaret Haswell (3rd ed.). Macmillan 1967 [i.e. 1968].

Chicago Style (17th ed.) Citation

Clark, Colin, and Margaret Rosary Haswell. The Economics of Subsistence Agriculture [by] Colin Clark and Margaret Haswell. 3rd ed. London: Macmillan 1967 [i.e. 1968].

MLA (9th ed.) Citation

Clark, Colin, and Margaret Rosary Haswell. The Economics of Subsistence Agriculture [by] Colin Clark and Margaret Haswell. 3rd ed. Macmillan 1967 [i.e. 1968].