Gerald O'Collins, SJ; Edward G. Farrugia, SJ (1996), Kamus Teologi, Penerbit Kanisius, hlm. 30, ISBN9789794975244, diarsipkan dari versi asli tanggal 2016-07-01, diakses tanggal 2016-07-28
scotlawcom.gov.uk
(Inggris) Report on Family Law (Scot Law Com No 135, 1992): http://www.scotlawcom.gov.uk/download_file/view/446/ See paragraph 8.23."In English law a decree of nullity in respect of a voidable marriage now has prospective effect only. It operates "to annul the marriage only as respects any time after the decree has been made absolute, and the marriage shall, notwithstanding the decree, be treated as if it has existed up to that time.""
Gerald O'Collins, SJ; Edward G. Farrugia, SJ (1996), Kamus Teologi, Penerbit Kanisius, hlm. 30, ISBN9789794975244, diarsipkan dari versi asli tanggal 2016-07-01, diakses tanggal 2016-07-28