Ekvall, R. B. (1960). Faithful echo. Twayne Pub.
芝加哥风格引文Ekvall, Robert Brainerd. Faithful Echo. New York: Twayne Pub, 1960.
MLA引文Ekvall, Robert Brainerd. Faithful Echo. Twayne Pub, 1960.
警告：这些引文格式不一定是100％准确.
APA引文
Ekvall, R. B. (1960). Faithful echo. Twayne Pub.
芝加哥风格引文Ekvall, Robert Brainerd. Faithful Echo. New York: Twayne Pub, 1960.
MLA引文Ekvall, Robert Brainerd. Faithful Echo. Twayne Pub, 1960.