APA (7e ed.) Bronvermelding

Berry, T. M. (1999). The great work: Our way into the future. Bell Tower.

Chicago (17e ed.) Bronvermelding

Berry, Thomas Mary. The Great Work: Our Way into the Future. New York: Bell Tower, 1999.

MLA (8e ed.) Bronvermelding

Berry, Thomas Mary. The Great Work: Our Way into the Future. Bell Tower, 1999.