Cita APA (7th ed.)

Dalessio, D. J. (1971). Proceedings of the International Headache Symposium: [held at] Elsinore, Denmark, 16th to 18th May 1971. Sandoz.

Cita Chicago (17th ed.)

Dalessio, Donald J. Proceedings of the International Headache Symposium: [held at] Elsinore, Denmark, 16th to 18th May 1971. Basle, Switzerland: Sandoz, 1971.

Cita MLA (9th ed.)

Dalessio, Donald J. Proceedings of the International Headache Symposium: [held at] Elsinore, Denmark, 16th to 18th May 1971. Sandoz, 1971.