Mitford, N., & Law, J. (1973). Frederick the Great: Nancy Mitford. Picture research by Joy Law. Penguin Books.
Citazione stile Chigago Style (17a edizione)Mitford, Nancy, e Joy Law. Frederick the Great: Nancy Mitford. Picture Research by Joy Law. Harmondsworth, Middlesex, England: Penguin Books, 1973.
Citatione MLA (8a ed.)Mitford, Nancy, e Joy Law. Frederick the Great: Nancy Mitford. Picture Research by Joy Law. Penguin Books, 1973.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.