Gaya APA
Bear, Firman A.. (1953).
Soils and fertilizers (text).
New York:
John Wiley & Sons.
Gaya Chicago
Bear, Firman A..
Soils and fertilizers.
text
New York:
John Wiley & Sons,
1953.
Tesis.
Gaya MLA
Bear, Firman A..
Soils and fertilizers.
text
New York:
John Wiley & Sons,
1953.
Tesis.
Gaya Turabian
Bear, Firman A..
Soils and fertilizers.
text
New York:
John Wiley & Sons,
1953.
Tesis.