Gaya APA

Garl, ., , G, D. (1971). Introduction to geophysics Mantle core and crust (1971). : Philadelphia : W B Saunders Company,.

Gaya MLA

Garl, ., , George, D. "Introduction to geophysics Mantle core and crust". 1971 : Philadelphia : W B Saunders Company,, 1971. Text.