Kants metaphysics and citing it?

A. W. aka Marie-Antoinette: You could also cite a website

You could also cite a website: “For instance, when the precept is: 'Thou shalt not promise deceitfully'; and it is assumed that the necessity of this is not a mere counsel to avoid some other evil, so that it should mean: 'Thou shalt not make a lying promise, lest if it become known thou shouldst destroy thy credit,' [...].” http://www.philosophy-index.com/kant/metaphysic_morals/section-2.php Or use an alternative translation: “... you should not make a false promise, the assumption is that the necessity of this avoidance is no mere advice for escaping some other evil, so that it might be said that you should not make a false promise lest you ruin your credit when the falsity comes to light.” Immanuel Kant, Grounding for the Metaphysics of Morals, trans. James W. Ellington (Indianapolis: Hackett Publishing Co., 1993), #419, p. 28.