Erickson, M. (1950). Missionary volunteers and their work. Review and Herald.
Chicago-viite (17. p.)Erickson, Matilda. Missionary Volunteers and Their Work. Review and Herald, 1950.
MLA-viite (9. p.)Erickson, Matilda. Missionary Volunteers and Their Work. Review and Herald, 1950.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.