Citação norma APA

Friedman, P., & O'Brien, J. A. (1957). Their brothers' keepers: The Christian heroes and heroines who helped the oppressed escape the Nazi terror. Crown.

Citação norma Chicago

Friedman, Philip, and John A. O'Brien. Their Brothers' Keepers: The Christian Heroes and Heroines Who Helped the Oppressed Escape the Nazi Terror. New York, N.Y: Crown, 1957.

Citação norma MLA

Friedman, Philip, and John A. O'Brien. Their Brothers' Keepers: The Christian Heroes and Heroines Who Helped the Oppressed Escape the Nazi Terror. Crown, 1957.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.