Cita APA (7a ed.)

Willett, H. L. (1931). The daily altar: An aid to private devotion and family worship. s.n.].

Cita Chicago Style (17a ed.)

Willett, Herbert Lockwood. The Daily Altar: An Aid to Private Devotion and Family Worship. [S.l: s.n.], 1931.

Cita MLA (9a ed.)

Willett, Herbert Lockwood. The Daily Altar: An Aid to Private Devotion and Family Worship. s.n.], 1931.