APA (7th ed.) Citation

Ryan, R. E., & Ryan, R. E. J. (1978). Headache and head pain: Diagnosis and treatment. Mosby.

Chicago Style (17th ed.) Citation

Ryan, Robert E., and Robert E. Junior Ryan. Headache and Head Pain: Diagnosis and Treatment. St. Louis: Mosby, 1978.

MLA (9th ed.) Citation

Ryan, Robert E., and Robert E. Junior Ryan. Headache and Head Pain: Diagnosis and Treatment. Mosby, 1978.