Walle, P. (1914). Bolivia: Its people and its resources its railways, mines, and rubber forest. T. Fisher Unwin.
Chicago-Zitierstil (17. Ausg.)Walle, Paul. Bolivia: Its People and Its Resources Its Railways, Mines, and Rubber Forest. London, England, United Kingdom: T. Fisher Unwin, 1914.
MLA-Zitierstil (9. Ausg.)Walle, Paul. Bolivia: Its People and Its Resources Its Railways, Mines, and Rubber Forest. T. Fisher Unwin, 1914.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.