APA-referens (7:e uppl.)

Fretz, J. W. (1953). Pilgrims in Paraguay: The story of Mennonite colonization in South America / [by] Joseph Winfield Fretz. Herald Pr..

Chicago-referens (17:e uppl.)

Fretz, Joseph Winfield. Pilgrims in Paraguay: The Story of Mennonite Colonization in South America / [by] Joseph Winfield Fretz. Scottdale, Pa.: Herald Pr., 1953.

MLA-referens (8:e uppl.)

Fretz, Joseph Winfield. Pilgrims in Paraguay: The Story of Mennonite Colonization in South America / [by] Joseph Winfield Fretz. Herald Pr., 1953.