Gaya APA

Placher, W, C, , (. (2005). Callings: Twenty centuries of Christian wisdom on vocation. . Grand Rapids: Grand Rapids William B Eerdmans.

Gaya MLA

Placher, William, C., , (ed.). "Callings: Twenty centuries of Christian wisdom on vocation. ". Grand Rapids: Grand Rapids William B Eerdmans, 2005. Buku.