Macdonald, E., Atkins, R., & Koffman, L. (2018). Koffman & Macdonald's law of contract/9th ed (9th ed.). Oxford University Press.
استشهاد بنمط شيكاغوMacdonald, Elizabeth, Ruth Atkins, و Laurence Koffman. Koffman & Macdonald's Law of Contract/9th Ed. 9th ed. N.Y: Oxford University Press, 2018.
MLA استشهادMacdonald, Elizabeth, et al. Koffman & Macdonald's Law of Contract/9th Ed. 9th ed. Oxford University Press, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.