Gaya APA
Butler, M.D.. (1955).
Conserving soil (text).
New Jersey:
D. Van Nostrand.
Gaya Chicago
Butler, M.D..
Conserving soil.
text
New Jersey:
D. Van Nostrand,
1955.
Tesis.
Gaya MLA
Butler, M.D..
Conserving soil.
text
New Jersey:
D. Van Nostrand,
1955.
Tesis.
Gaya Turabian
Butler, M.D..
Conserving soil.
text
New Jersey:
D. Van Nostrand,
1955.
Tesis.