APA

Iohannes Paulus PP, Willetts H., . (1981). Love and responsibility. New York: Farrar, Straus and Giroux.

Chicago

Iohannes Paulus PP, Willetts H.T, . 1981. Love and responsibility. New York: Farrar, Straus and Giroux.

Harvard

Iohannes Paulus PP, Willetts H., . (1981). Love and responsibility. New York: Farrar, Straus and Giroux.

MLA

Iohannes Paulus PP, Willetts H.T, . Love and responsibility. New York: Farrar, Straus and Giroux. 1981.