APA (7th ed.) Citation

Smith, H. W. (1966). The Christian's secret of a happy life. F.H. Revell.

Chicago Style (17th ed.) Citation

Smith, Hannah Whitall. The Christian's Secret of a Happy Life. F.H. Revell, 1966.

MLA (9th ed.) Citation

Smith, Hannah Whitall. The Christian's Secret of a Happy Life. F.H. Revell, 1966.

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