Thomas Gaskell Allan ve William Lewis Sachtleben, Accross Asia on a Bicycle, Seatle: Inkling Books, 2003, 167, s. ISBN 978-158-7420-20-1

ÇAYKENT, Ö. (2016). Thomas Gaskell Allan ve William Lewis Sachtleben, Accross Asia on a Bicycle, Seatle: Inkling Books, 2003, 167, s. ISBN 978-158-7420-20-1. Osmanlı Araştırmaları, Sayı: 48, 471–476. https://ajindex.com/articles/287456