Laz, M. (1978). The six levels of a happy marriage. Liguori Publications.
Lua i Stíl Chicago (17ú heag.)Laz, Medard. The Six Levels of a Happy Marriage. Liguori, Mo.: Liguori Publications, 1978.
Lua MLA (8ú heag.)Laz, Medard. The Six Levels of a Happy Marriage. Liguori Publications, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.