Willett, H. L. (1931). The daily altar: An aid to private devotion and family worship. s.n.].
Chicago-referens (17:e uppl.)Willett, Herbert Lockwood. The Daily Altar: An Aid to Private Devotion and Family Worship. [S.l: s.n.], 1931.
MLA-referens (9:e uppl.)Willett, Herbert Lockwood. The Daily Altar: An Aid to Private Devotion and Family Worship. s.n.], 1931.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.