Walle, P. (1914). Bolivia: Its people and its resources its railways, mines, and rubber forest. T. Fisher Unwin.
Chicagoスタイル(17版)引用形式Walle, Paul. Bolivia: Its People and Its Resources Its Railways, Mines, and Rubber Forest. London, England, United Kingdom: T. Fisher Unwin, 1914.
MLA(9版)引用形式Walle, Paul. Bolivia: Its People and Its Resources Its Railways, Mines, and Rubber Forest. T. Fisher Unwin, 1914.
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