- Buku AudioPrinciples of EconomicsAlfred Marshall
- Buku AudioPrinciples of Economics, Book 1Alfred Marshall
- Buku AudioPrinciples of Economics, Book 4Alfred Marshall
- Buku AudioPrinciples of Economics, The AppendicesAlfred Marshall
- Buku AudioPrinciples of Economics, Book 6Alfred Marshall
- Buku AudioPrinciples of Economics, Book 2Alfred Marshall
- Buku AudioPrinciples of Economics, Book 5Alfred Marshall
- Buku AudioPrinciples of Economics, Book 3Alfred Marshall