Dyfyniad APA
ebrary, Inc, Wolff, H. G., Silberstein, S. D., Lipton, R. B., & Dalessio, D. J. (2001). Wolff's headache and other head pain (7th ed.). Oxford University Press.
Dyfyniad Arddull Chicago
ebrary, Inc, Harold G. Wolff, Stephen D. Silberstein, Richard B. Lipton, and Donald J. Dalessio. Wolff's Headache and Other Head Pain. 7th ed. New York: Oxford University Press, 2001.
Dyfyniad MLA
ebrary, Inc, et al. Wolff's Headache and Other Head Pain. 7th ed. Oxford University Press, 2001.
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