APA Style
Heller, Robert L...[et.al.]. (1973).
Challenges to science : earth sciences .
New York:
Webster Division.
Chicago Style
Heller, Robert L...[et.al.].
Challenges to science : earth sciences.
New York:
Webster Division,
1973.
Buku Teks.
MLA Style
Heller, Robert L...[et.al.].
Challenges to science : earth sciences.
New York:
Webster Division,
1973.
Buku Teks.
Turabian Style
Heller, Robert L...[et.al.].
Challenges to science : earth sciences.
New York:
Webster Division,
1973.
Buku Teks.