Gaya APA
Spencer, Edgar W.. (1969).
Introduction to the structure of the earth (text).
New York:
McGraw Hill Book Company.
Gaya Chicago
Spencer, Edgar W..
Introduction to the structure of the earth.
text
New York:
McGraw Hill Book Company,
1969.
.
Gaya MLA
Spencer, Edgar W..
Introduction to the structure of the earth.
text
New York:
McGraw Hill Book Company,
1969.
.
Gaya Turabian
Spencer, Edgar W..
Introduction to the structure of the earth.
text
New York:
McGraw Hill Book Company,
1969.
.