Gaya APA
Thornbury, William D.. (1954).
Principles of geomorphology (text).
New York:
John Wiley & Sons.
Gaya Chicago
Thornbury, William D..
Principles of geomorphology.
text
New York:
John Wiley & Sons,
1954.
Tesis.
Gaya MLA
Thornbury, William D..
Principles of geomorphology.
text
New York:
John Wiley & Sons,
1954.
Tesis.
Gaya Turabian
Thornbury, William D..
Principles of geomorphology.
text
New York:
John Wiley & Sons,
1954.
Tesis.