APA (7th ed.) Citation

Smith, H. W. (1999). The Christian's secret of a happy life. T. Nelson Publishers.

Chicago Style (17th ed.) Citation

Smith, Hannah Whitall. The Christian's Secret of a Happy Life. Nashville: T. Nelson Publishers, 1999.

MLA (9th ed.) Citation

Smith, Hannah Whitall. The Christian's Secret of a Happy Life. T. Nelson Publishers, 1999.

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