ebrary, Inc, Hornemann, F., Laing, A. G., & Bovill, E. W. (2010). Missions to the Niger. Ashgate.
Čikaški stil citiranja (17. izdanje)ebrary, Inc, Friedrich Hornemann, Alexander Gordon Laing, i E. W. Bovill. Missions to the Niger. Farnham, Surrey, England ; Burlington, VT: Ashgate, 2010.
MLA način citiranja (9. izdanje)ebrary, Inc, et al. Missions to the Niger. Ashgate, 2010.
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