Lua APA (7ú heag.)

DAVIS BARBARA. (2019). MINERALS, ROCK AND SOIL (2009 Ed.). RAINTREE PUBLISHERS.

Lua i Stíl Chicago (17ú heag.)

DAVIS BARBARA. MINERALS, ROCK AND SOIL. 2009 Ed. CHICAGO: RAINTREE PUBLISHERS, 2019.

Lua MLA (9ú heag.)

DAVIS BARBARA. MINERALS, ROCK AND SOIL. 2009 Ed. RAINTREE PUBLISHERS, 2019.

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