Spencer, D. Study Guide [to Accompany Parkin's] Economics. Reading, Massachusetts: Addison-Wesley, 1990 XI, 602 с. : с табл., сх. 0-201-05932-0.
Spencer, D. Study Guide [to Accompany Parkin's] Economics. Reading, Massachusetts: Addison-Wesley, 1990 XI, 602 с. : с табл., сх. 0-201-05932-0.
Spencer, D. (1990) Study Guide [to Accompany Parkin's] Economics, Reading, Massachusetts: Addison-Wesley XI, 602 с. : с табл., сх. 0-201-05932-0.
Spencer, D. (1990). Study Guide [to Accompany Parkin's] Economics. Reading, Massachusetts: Addison-Wesley, XI, 602 с. : с табл., сх.
Spencer D. Study Guide [to Accompany Parkin's] Economics. Reading, Massachusetts: Addison-Wesley; 1990. p. XI, 602 с. : с табл., сх. ISBN: 0-201-05932-0.