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)

The correct answer is this one: "b. (Cowan and Duncan, 2000)." Cowan, Gary, and Roy Duncan. Helicopters. New York: Random House, 2000. This paper should be cited, following the American Psychology Association Citation structure, in this way: (Cowan and Duncan, 2000).