Pennod 8 "The Ohio Gymanva", Rhan 2, y llyfr "One Hundred Years of Welsh Calvinistic Methodism in America":
"Churches of the Jackson Presbytery",
"The Churches of the Western Presbytery",
"Churches of the Pittsburgh Presbytery".

Gyda diolch i Wales-PA, mae’n bleser gan Sarah Fenno Williams
ac Edith Tuckerman Williams, wyresau’r Parchedig Daniel Jenkins
Williams, Ph.D., D.D., weld ei gyfrol, "One Hundred Years of Welsh
Calvinistic Methodism in America", a gyhoeddwyd yn wreiddiol ym
1937, ar gael arlein.