Purity resource book, [s.d.]

[description english/roman)] Purity resource book, a supplement to the Purity guide, with an introduction by Thelma E Cotton, Church of God in Christ, [s.d.].《圣洁资源手册》（Purity resource book）系《圣洁指南》（Purity guide）的配套补充读物，由基督神教会（Church of God in Christ）的塞尔玛·E·科顿（Thelma E Cotton）撰写引言，无出版日期（s.d.）。