http://www.issia.cnr.it/ http://www.ba.iac.cnr.it/wp/ https://ntnucamp.sce.ntnu.edu.tw/ http://leda.elfak.ni.ac.rs/

Gaya APA

Witney, D, S. (1991). Spiritual Disciplines for the Christian Life . Colorado Springs, Colorado, US: NavPress.

Gaya MLA

Witney, Donald, S.. "Spiritual Disciplines for the Christian Life". Colorado Springs, Colorado, US: NavPress, 1991. Academic.