Cita APA (7th ed.)

Packer, J. (1984). Keep in step with the spirit. Inter-Varsity.

Cita Chicago (17th ed.)

Packer, J.I. Keep in Step with the Spirit. New Jersey: Inter-Varsity, 1984.

Cita MLA (9th ed.)

Packer, J.I. Keep in Step with the Spirit. Inter-Varsity, 1984.