APA

Portmann J. [., . (2003). Sex and heaven. New York: Palgrave Macmillan.

Chicago

Portmann John [F], . 2003. Sex and heaven. New York: Palgrave Macmillan.

Harvard

Portmann J. [., . (2003). Sex and heaven. New York: Palgrave Macmillan.

MLA

Portmann John [F], . Sex and heaven. New York: Palgrave Macmillan. 2003.