APA Style
Ellsbury,M.M and Nielson,M.W. (1981).
Comparative Host Plant Range Studies of the Blue Alafalfa Aphid, Acyrthosiphon Kondoi shinji, and the Pea Aphid, Acyrthosiphon Pisum (Harris) (Homoptera: Aphididae) (USDA) .
USA:
USDA Forest Service.
Chicago Style
Ellsbury,M.M and Nielson,M.W.
Comparative Host Plant Range Studies of the Blue Alafalfa Aphid, Acyrthosiphon Kondoi shinji, and the Pea Aphid, Acyrthosiphon Pisum (Harris) (Homoptera: Aphididae) (USDA).
USA:
USDA Forest Service,
1981.
.
MLA Style
Ellsbury,M.M and Nielson,M.W.
Comparative Host Plant Range Studies of the Blue Alafalfa Aphid, Acyrthosiphon Kondoi shinji, and the Pea Aphid, Acyrthosiphon Pisum (Harris) (Homoptera: Aphididae) (USDA).
USA:
USDA Forest Service,
1981.
.
Turabian Style
Ellsbury,M.M and Nielson,M.W.
Comparative Host Plant Range Studies of the Blue Alafalfa Aphid, Acyrthosiphon Kondoi shinji, and the Pea Aphid, Acyrthosiphon Pisum (Harris) (Homoptera: Aphididae) (USDA).
USA:
USDA Forest Service,
1981.
.