Dyfyniad APA

Ellis, S. J. (1997). What's in a name? The classification of common headaches. BMJ Group.

Dyfyniad Arddull Chicago

Ellis, S. J. What's in a Name? The Classification of Common Headaches. BMJ Group, 1997.

Dyfyniad MLA

Ellis, S. J. What's in a Name? The Classification of Common Headaches. BMJ Group, 1997.

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