Style de citation APA (7e éd.)

Tietjen, M. L. (1976). The Bethlehem tree: A family Advent resource book. Paulist Press.

Style de citation Chicago (17e éd.)

Tietjen, Mary Louise. The Bethlehem Tree: A Family Advent Resource Book. New York: Paulist Press, 1976.

Style de citation MLA (8e éd.)

Tietjen, Mary Louise. The Bethlehem Tree: A Family Advent Resource Book. Paulist Press, 1976.