1. Which of the following citations is correct?
a. Many researchers have discussed this issue (Johnson 9; Rashidi 98).
b. Many researchers have discussed this issue. (Johnson 9; Rashidi 98)
c. Many researchers have discussed this issue (Johnson, 2010; Rashidi, 2003).
d. Many researchers have discussed this issue. (Johnson, 2010; Rashidi, 2003).