Managerial economics : analysis and strategy / Evan J. Douglass with empirical cases by Scott Callan. (1994). Englewood Cliffs, NJ: Prentice-Hall, c.
Managerial economics : analysis and strategy / Evan J. Douglass with empirical cases by Scott Callan. 4th ed.. Englewood Cliffs, NJ: Prentice-Hall, c, 1994. Buku Wajib.