APA

Hildebrand D. v., Crosby J. H., Schmitz K. L. & Crosby J. F. (2009). The nature of love. South Bend (Ind.): St. Augustine's Press.

Chicago

Hildebrand Dietrich von, Crosby John Henry, Schmitz Kenneth L and Crosby John F. 2009. The nature of love. South Bend (Ind.): St. Augustine's Press.

Harvard

Hildebrand D. v., Crosby J. H., Schmitz K. L. and Crosby J. F. (2009). The nature of love. South Bend (Ind.): St. Augustine's Press.

MLA

Hildebrand Dietrich von, Crosby John Henry, Schmitz Kenneth L and Crosby John F. The nature of love. South Bend (Ind.): St. Augustine's Press. 2009.