APA

Helmstadter R., . (1997). Freedom and religion in the nineteenth century. Stanford (Ca.): Stanford University Press.

Chicago

Helmstadter Richard, . 1997. Freedom and religion in the nineteenth century. Stanford (Ca.): Stanford University Press.

Harvard

Helmstadter R., . (1997). Freedom and religion in the nineteenth century. Stanford (Ca.): Stanford University Press.

MLA

Helmstadter Richard, . Freedom and religion in the nineteenth century. Stanford (Ca.): Stanford University Press. 1997.