APA

Sheerin J. B., . (1967). A practical guide to ecumenism. New York: Paulist Press.

Chicago

Sheerin John B, . 1967. A practical guide to ecumenism. New York: Paulist Press.

Harvard

Sheerin J. B., . (1967). A practical guide to ecumenism. New York: Paulist Press.

MLA

Sheerin John B, . A practical guide to ecumenism. New York: Paulist Press. 1967.