Cita APA (7th ed.)
LaHaye, T. F. (1968). How to be happy though married. Tyndale House Publishers.
Cita Chicago (17th ed.)
LaHaye, Tim F. How to Be Happy Though Married. Wheaton, Ill.: Tyndale House Publishers, 1968.
Cita MLA (9th ed.)
LaHaye, Tim F. How to Be Happy Though Married. Tyndale House Publishers, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.