Gaya APA
SPENCER, Edgar W.. (1988).
Introduction to The Structure of the Earth (3rd.ed).
New York:
McGraw Hill Book Company.
Gaya Chicago
SPENCER, Edgar W..
Introduction to The Structure of the Earth.
3rd.ed
New York:
McGraw Hill Book Company,
1988.
Teks.
Gaya MLA
SPENCER, Edgar W..
Introduction to The Structure of the Earth.
3rd.ed
New York:
McGraw Hill Book Company,
1988.
Teks.
Gaya Turabian
SPENCER, Edgar W..
Introduction to The Structure of the Earth.
3rd.ed
New York:
McGraw Hill Book Company,
1988.
Teks.