Gaya APA
Walker, John Charles. (1969).
Plant pathology .
New Delhi:
Tata Mc Graw hill.
Gaya Chicago
Walker, John Charles.
Plant pathology.
New Delhi:
Tata Mc Graw hill,
1969.
Tesis.
Gaya MLA
Walker, John Charles.
Plant pathology.
New Delhi:
Tata Mc Graw hill,
1969.
Tesis.
Gaya Turabian
Walker, John Charles.
Plant pathology.
New Delhi:
Tata Mc Graw hill,
1969.
Tesis.