Bernstein, Amy L. (1997). "The First American Made Umbrellas". Baltimore, 1797-1997: Bringing Our Heritage into the 21st Century. Encino, CA: Cherbo Pub. Group. p. 121.
Xiaohan Zhou; Xiaoping Hu (2020). "Human Factors Engineering Research on Folding Umbrellas Design". In Francisco Rebelo; Marcelo Marcio Soares (eds.). Advances in Ergonomics in Design. AHFE 2019 International Conference on Ergonomics in Design, July 24–28, 2019, Washington D.C., USA. Cham: Springer. doi:10.1007/978-3-030-20227-9_14. ISBN978-3-030-20227-9. OCLC1104083491.
Xiaohan Zhou; Xiaoping Hu (2020). "Human Factors Engineering Research on Folding Umbrellas Design". In Francisco Rebelo; Marcelo Marcio Soares (eds.). Advances in Ergonomics in Design. AHFE 2019 International Conference on Ergonomics in Design, July 24–28, 2019, Washington D.C., USA. Cham: Springer. doi:10.1007/978-3-030-20227-9_14. ISBN978-3-030-20227-9. OCLC1104083491.