APA استشهاد

Williams, P. C. (1965). lumbosacral spine. McGraw-Hill.

استشهاد بنمط شيكاغو

Williams, Paul C. Lumbosacral Spine. London: McGraw-Hill, 1965.

MLA استشهاد

Williams, Paul C. Lumbosacral Spine. McGraw-Hill, 1965.