Cita APA (7th ed.)

Costas, O. E. (1982). Christ outside the gate: Mission beyond christendom. Orbis.

Cita Chicago (17th ed.)

Costas, Orlando E. Christ Outside the Gate: Mission Beyond Christendom. New York: Orbis, 1982.

Cita MLA (9th ed.)

Costas, Orlando E. Christ Outside the Gate: Mission Beyond Christendom. Orbis, 1982.