Gaya APA
Edwards, Clive A.. (1990).
Sustainable Agricultural Systems .
Iowa:
SOIL AND WATER CONSERVATION SOCIETY.
Gaya Chicago
Edwards, Clive A..
Sustainable Agricultural Systems.
Iowa:
SOIL AND WATER CONSERVATION SOCIETY,
1990.
.
Gaya MLA
Edwards, Clive A..
Sustainable Agricultural Systems.
Iowa:
SOIL AND WATER CONSERVATION SOCIETY,
1990.
.
Gaya Turabian
Edwards, Clive A..
Sustainable Agricultural Systems.
Iowa:
SOIL AND WATER CONSERVATION SOCIETY,
1990.
.