APA (7th ed.) Citation

Tyrrell, C. A. The Royal Road to Health; Or, the Secret of Health Without Drugs.

Chicago Style (17th ed.) Citation

Tyrrell, Chas. A. The Royal Road to Health; Or, the Secret of Health Without Drugs.

MLA (9th ed.) Citation

Tyrrell, Chas. A. The Royal Road to Health; Or, the Secret of Health Without Drugs.

Warning: These citations may not always be 100% accurate.