Gaya APA
Simon, R, B. (1981).
Earthquake Interpretations : A Manual for Reading Seismograms .
United State of America:
William Kaufman, Inc.
Gaya MLA
Simon, Ruth, B..
"Earthquake Interpretations : A Manual for Reading Seismograms".
United State of America:
William Kaufman, Inc,
1981.
Text.