Cowan, Gary, and Roy Duncan. Helicopters. New York: Random House, 2000. How should this source be cited in the paper?
A(Gary Cown, 2000)
B(Cowan and Duncan, 2000)
C(Helicopters, 2000)
D(Cowan and Duncan, Helicopters, 2000)
A(Gary Cown, 2000)
B(Cowan and Duncan, 2000)
C(Helicopters, 2000)
D(Cowan and Duncan, Helicopters, 2000)