APA (7th ed.) Zitazioa

Walle, P. (1914). Bolivia: Its people and its resources its railways, mines, and rubber forest. T. Fisher Unwin.

Chicago Style (17th ed.) Zitazioa

Walle, Paul. Bolivia: Its People and Its Resources Its Railways, Mines, and Rubber Forest. London, England, United Kingdom: T. Fisher Unwin, 1914.

MLA (9th ed.) Zitazioa

Walle, Paul. Bolivia: Its People and Its Resources Its Railways, Mines, and Rubber Forest. T. Fisher Unwin, 1914.