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

Guinness, O. (1998). Call, The : Finding and fulfilling the central purpose of your life . Nashville, Tennessee, USA: Word Publishing.

Gaya MLA

Guinness, Os. "Call, The : Finding and fulfilling the central purpose of your life". Nashville, Tennessee, USA: Word Publishing, 1998. Commentary.