APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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