Gardner, R. D. (1978). Horatio Alger: Or, The American hero era. Arco Pub.
芝加哥风格引文Gardner, Ralph D. Horatio Alger: Or, The American Hero Era. New York: Arco Pub, 1978.
MLA引文Gardner, Ralph D. Horatio Alger: Or, The American Hero Era. Arco Pub, 1978.
警告：这些引文格式不一定是100％准确.