Παραπομπή APA

Boldt, J. R. (1967). The winning of nickel: Its geology, mining, and extractive metallurgy. London: Methuen.

Παραπομπή Chicago Style

Boldt, Joseph R. The Winning of Nickel: Its Geology, Mining, and Extractive Metallurgy. London: Methuen, 1967.

Παραπομπή MLA

Boldt, Joseph R. The Winning of Nickel: Its Geology, Mining, and Extractive Metallurgy. London: Methuen, 1967.

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