Gaya APA

Johannsen, A. (1939). A descriptive petrography of the igneous rocks. Vol.1 introduction, textures,classification,and glossary (1939). : Illinois : The University of Chicago Press,.

Gaya MLA

Johannsen, Albert. "A descriptive petrography of the igneous rocks. Vol.1 introduction, textures,classification,and glossary". 1939 : Illinois : The University of Chicago Press,, 1939. Text.