Gaya APA

Hatch, F., Wells, A. (1973). Petrology of the igneous rocks. volume one. (1973). : New York : Hafner Press,.

Gaya MLA

Hatch, F.H.., Wells, A.K.A. "Petrology of the igneous rocks. volume one.". 1973 : New York : Hafner Press,, 1973. Text.