APA

Pius PP, . (1944). Encyclical letter (Divino afflante Spiritu) of his holiness Pius XII by divine providence pope [...] on biblical studies and opportune means of promoting them. London: Catholic Truth Society.

Chicago

Pius PP, . 1944. Encyclical letter (Divino afflante Spiritu) of his holiness Pius XII by divine providence pope [...] on biblical studies and opportune means of promoting them. London: Catholic Truth Society.

Harvard

Pius PP, . (1944). Encyclical letter (Divino afflante Spiritu) of his holiness Pius XII by divine providence pope [...] on biblical studies and opportune means of promoting them. London: Catholic Truth Society.

MLA

Pius PP, . Encyclical letter (Divino afflante Spiritu) of his holiness Pius XII by divine providence pope [...] on biblical studies and opportune means of promoting them. London: Catholic Truth Society. 1944.