APA (7th ed.) Citation

Johnson, F. N., & Johnson, S. (1977). Clinical trials. Blackwell Scientific Publications.

Chicago Style (17th ed.) Citation

Johnson, F. Neil, and Susan Johnson. Clinical Trials. Oxford [England]: Blackwell Scientific Publications, 1977.

MLA (9th ed.) Citation

Johnson, F. Neil, and Susan Johnson. Clinical Trials. Blackwell Scientific Publications, 1977.