Gaya APA

Crawford, V. (1944). The Church and the worker, before and after the Encyclical Rerum novarum, (4th ed.). . Oxford: Catholic social guild.

Gaya MLA

Crawford, V.M.. "The Church and the worker, before and after the Encyclical Rerum novarum, (4th ed.). ". Oxford: Catholic social guild, 1944. Buku.