Gaya APA

Aki, K., Richards, P, G. (1980). Quantitative Seismology Theory and Methods . United States of America: W. H. Freeman and Company.

Gaya MLA

Aki, Keiiti., Richards, Paul, G.. "Quantitative Seismology Theory and Methods". United States of America: W. H. Freeman and Company, 1980. Buku.