APA

Pieper J., . (1987). No one could have known: an autobiography, the early years, 1904-1945. San Francisco: Ignatius Press.

Chicago

Pieper Josef, . 1987. No one could have known: an autobiography, the early years, 1904-1945. San Francisco: Ignatius Press.

Harvard

Pieper J., . (1987). No one could have known: an autobiography, the early years, 1904-1945. San Francisco: Ignatius Press.

MLA

Pieper Josef, . No one could have known: an autobiography, the early years, 1904-1945. San Francisco: Ignatius Press. 1987.