Gaya APA
Soil survey manual: soil survey staff. (1969).
Calcutta:
Oxford and IBH Publishing.
Gaya Chicago
Soil survey manual: soil survey staff.
text.
Calcutta:
Oxford and IBH Publishing,
1969.
Tesis.
Gaya MLA
Soil survey manual: soil survey staff.
text.
Calcutta:
Oxford and IBH Publishing,
1969.
Tesis.
Gaya Turabian
Soil survey manual: soil survey staff.
Calcutta:
Oxford and IBH Publishing,
1969.
Tesis.