APA

Sloyan G. S., . (1963). Modern catechetics. New York: Macmillan.

Chicago

Sloyan Gerard Stephen, . 1963. Modern catechetics. New York: Macmillan.

Harvard

Sloyan G. S., . (1963). Modern catechetics. New York: Macmillan.

MLA

Sloyan Gerard Stephen, . Modern catechetics. New York: Macmillan. 1963.