Atherton, Ian; Bosanquet, Sam; Lawley, Mark. "Bartramia pomiformis Common Apple-moss"(PDF). Mosses and liverworts of Britain and Ireland a field guide. 3 Şubat 2018 tarihinde kaynağından arşivlendi(PDF). Erişim tarihi: 25 Şubat 2020.
Atherton, Ian; Bosanquet, Sam; Lawley, Mark. "Bartramia pomiformis Common Apple-moss"(PDF). Mosses and liverworts of Britain and Ireland a field guide. 3 Şubat 2018 tarihinde kaynağından arşivlendi(PDF). Erişim tarihi: 25 Şubat 2020.