APA (7th ed.) Citation

Courtney, A. B. Dr. Courtney's guide to happy marriage.

Chicago Style (17th ed.) Citation

Courtney, A. B. Dr. Courtney's Guide to Happy Marriage.

MLA (9th ed.) Citation

Courtney, A. B. Dr. Courtney's Guide to Happy Marriage.

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