Howard, M. C., & King, J. E. (1985). The political economy of Marx (2nd ed.). Longman.
Lua i Stíl Chicago (17ú heag.)Howard, Michael Charles, agus J. E. King. The Political Economy of Marx. 2nd ed. London ; New York: Longman, 1985.
Lua MLA (9ú heag.)Howard, Michael Charles, agus J. E. King. The Political Economy of Marx. 2nd ed. Longman, 1985.