ebrary, Inc, Hornemann, F., Laing, A. G., & Bovill, E. W. (2010). Missions to the Niger. Ashgate.
芝加哥风格引文ebrary, Inc, Friedrich Hornemann, Alexander Gordon Laing, 与 E. W. Bovill. Missions to the Niger. Farnham, Surrey, England ; Burlington, VT: Ashgate, 2010.
MLA引文ebrary, Inc, et al. Missions to the Niger. Ashgate, 2010.
警告：这些引文格式不一定是100％准确.