Bosworth, D. P. (1991). Open learning. Cassell.
芝加哥风格引文Bosworth, David P. Open Learning. London ; New York: Cassell, 1991.
MLA引文Bosworth, David P. Open Learning. Cassell, 1991.
警告：这些引文格式不一定是100％准确.
APA引文
Bosworth, D. P. (1991). Open learning. Cassell.
芝加哥风格引文Bosworth, David P. Open Learning. London ; New York: Cassell, 1991.
MLA引文Bosworth, David P. Open Learning. Cassell, 1991.