Royal Geographical Society (Great Britain), Freshfield, D. W., & Wharton, W. J. L. (1889). Hints to travellers, scientific and general (6th ed., rev. and enl.). Royal Geographical Society.
Dyfyniad Arddull ChicagoRoyal Geographical Society (Great Britain), Douglas William Freshfield, and W. J. L. Wharton. Hints to Travellers, Scientific and General. 6th ed., rev. and enl. London: Royal Geographical Society, 1889.
Dyfyniad MLARoyal Geographical Society (Great Britain), et al. Hints to Travellers, Scientific and General. 6th ed., rev. and enl. Royal Geographical Society, 1889.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.