Gaya APA
matematicatilGeology, I, A. (1985).
Jurnal of the Internasional Association for Mathematical Geologi .
U.S.A:
Jurnal of Internasional Association Matematical Geology.
Gaya MLA
matematicatilGeology, Internasional, AssogeotionPoo.
"Jurnal of the Internasional Association for Mathematical Geologi".
U.S.A:
Jurnal of Internasional Association Matematical Geology,
1985.
Textbook.